diff --git a/astrbot/core/agent/runners/dashscope/dashscope_agent_runner.py b/astrbot/core/agent/runners/dashscope/dashscope_agent_runner.py
index 1aaf6e3b9..8169a678c 100644
--- a/astrbot/core/agent/runners/dashscope/dashscope_agent_runner.py
+++ b/astrbot/core/agent/runners/dashscope/dashscope_agent_runner.py
@@ -302,7 +302,7 @@ class DashscopeAgentRunner(BaseAgentRunner[TContext]):
 
         while True:
             try:
-                item_type, item_data = await asyncio.get_event_loop().run_in_executor(
+                item_type, item_data = await asyncio.get_running_loop().run_in_executor(
                     None, response_queue.get, True, 1
                 )
             except queue.Empty:
@@ -388,7 +388,7 @@ class DashscopeAgentRunner(BaseAgentRunner[TContext]):
 
         # 发起请求
         partial = functools.partial(Application.call, **payload)
-        response = await asyncio.get_event_loop().run_in_executor(None, partial)
+        response = await asyncio.get_running_loop().run_in_executor(None, partial)
 
         async for resp in self._handle_streaming_response(response, session_id):
             yield resp
diff --git a/astrbot/core/computer/booters/bay_manager.py b/astrbot/core/computer/booters/bay_manager.py
index 24fa379e8..61ccc1b3a 100644
--- a/astrbot/core/computer/booters/bay_manager.py
+++ b/astrbot/core/computer/booters/bay_manager.py
@@ -121,11 +121,12 @@ class BayContainerManager:
     async def wait_healthy(self, timeout: int = HEALTH_TIMEOUT_S) -> None:
         """Block until Bay's ``/health`` endpoint returns 200."""
         url = f"http://127.0.0.1:{self._host_port}/health"
-        deadline = asyncio.get_event_loop().time() + timeout
+        loop = asyncio.get_running_loop()
+        deadline = loop.time() + timeout
         last_error: str = ""
 
         async with aiohttp.ClientSession() as session:
-            while asyncio.get_event_loop().time() < deadline:
+            while loop.time() < deadline:
                 try:
                     async with session.get(
                         url, timeout=aiohttp.ClientTimeout(total=3)
diff --git a/astrbot/core/message/components.py b/astrbot/core/message/components.py
index 6dbe78ae4..d9ea6aa26 100644
--- a/astrbot/core/message/components.py
+++ b/astrbot/core/message/components.py
@@ -699,21 +699,24 @@ class File(BaseMessageComponent):
 
         if self.url:
             try:
-                loop = asyncio.get_event_loop()
-                if loop.is_running():
-                    logger.warning(
-                        "不可以在异步上下文中同步等待下载! "
-                        "这个警告通常发生于某些逻辑试图通过 <File>.file 获取文件消息段的文件内容。"
-                        "请使用 await get_file() 代替直接获取 <File>.file 字段",
-                    )
-                    return ""
-                # 等待下载完成
-                loop.run_until_complete(self._download_file())
+                # 检查是否有正在运行的 event loop
+                asyncio.get_running_loop()
+                logger.warning(
+                    "不可以在异步上下文中同步等待下载! "
+                    "这个警告通常发生于某些逻辑试图通过 <File>.file 获取文件消息段的文件内容。"
+                    "请使用 await get_file() 代替直接获取 <File>.file 字段",
+                )
+                return ""
+            except RuntimeError:
+                # 没有运行中的 event loop，可以同步执行
+                try:
+                    # 使用 asyncio.run 安全地创建和关闭事件循环
+                    asyncio.run(self._download_file())
+                except Exception:
+                    logger.exception("文件下载失败")
 
                 if self.file_ and os.path.exists(self.file_):
                     return os.path.abspath(self.file_)
-            except Exception as e:
-                logger.error(f"文件下载失败: {e}")
 
         return ""
 
diff --git a/astrbot/core/platform/sources/dingtalk/dingtalk_adapter.py b/astrbot/core/platform/sources/dingtalk/dingtalk_adapter.py
index 7982a6593..37c3b09ab 100644
--- a/astrbot/core/platform/sources/dingtalk/dingtalk_adapter.py
+++ b/astrbot/core/platform/sources/dingtalk/dingtalk_adapter.py
@@ -367,7 +367,7 @@ class DingtalkPlatformAdapter(Platform):
 
     async def get_access_token(self) -> str:
         try:
-            access_token = await asyncio.get_event_loop().run_in_executor(
+            access_token = await asyncio.get_running_loop().run_in_executor(
                 None,
                 self.client_.get_access_token,
             )
@@ -760,7 +760,7 @@ class DingtalkPlatformAdapter(Platform):
                     return
                 logger.error(f"钉钉机器人启动失败: {e}")
 
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
         await loop.run_in_executor(None, start_client, loop)
 
     async def terminate(self) -> None:
diff --git a/astrbot/core/platform/sources/qqofficial/qqofficial_message_event.py b/astrbot/core/platform/sources/qqofficial/qqofficial_message_event.py
index 868ec8a65..2b417f45f 100644
--- a/astrbot/core/platform/sources/qqofficial/qqofficial_message_event.py
+++ b/astrbot/core/platform/sources/qqofficial/qqofficial_message_event.py
@@ -80,7 +80,7 @@ class QQOfficialMessageEvent(AstrMessageEvent):
 
                 if isinstance(source, botpy.message.C2CMessage):
                     # 真流式传输
-                    current_time = asyncio.get_event_loop().time()
+                    current_time = asyncio.get_running_loop().time()
                     time_since_last_edit = current_time - last_edit_time
 
                     if time_since_last_edit >= throttle_interval:
@@ -90,7 +90,7 @@ class QQOfficialMessageEvent(AstrMessageEvent):
                         )
                         stream_payload["index"] += 1
                         stream_payload["id"] = ret["id"]
-                        last_edit_time = asyncio.get_event_loop().time()
+                        last_edit_time = asyncio.get_running_loop().time()
 
             if isinstance(source, botpy.message.C2CMessage):
                 # 结束流式对话，并且传输 buffer 中剩余的消息
diff --git a/astrbot/core/platform/sources/qqofficial_webhook/qo_webhook_server.py b/astrbot/core/platform/sources/qqofficial_webhook/qo_webhook_server.py
index 5f35471ee..bcd05faf1 100644
--- a/astrbot/core/platform/sources/qqofficial_webhook/qo_webhook_server.py
+++ b/astrbot/core/platform/sources/qqofficial_webhook/qo_webhook_server.py
@@ -55,7 +55,7 @@ class QQOfficialWebhook:
             max_async=1,
             connect=bot_connect,
             dispatch=self.client.ws_dispatch,
-            loop=asyncio.get_event_loop(),
+            loop=asyncio.get_running_loop(),
             api=self.api,
         )
 
diff --git a/astrbot/core/platform/sources/telegram/tg_event.py b/astrbot/core/platform/sources/telegram/tg_event.py
index 96c7c5568..43e58960e 100644
--- a/astrbot/core/platform/sources/telegram/tg_event.py
+++ b/astrbot/core/platform/sources/telegram/tg_event.py
@@ -626,7 +626,7 @@ class TelegramPlatformEvent(AstrMessageEvent):
 
         # 发送初始 typing 状态
         await self._ensure_typing(user_name, message_thread_id)
-        last_chat_action_time = asyncio.get_event_loop().time()
+        last_chat_action_time = asyncio.get_running_loop().time()
 
         def _append_text(t: str) -> None:
             nonlocal delta
@@ -657,11 +657,11 @@ class TelegramPlatformEvent(AstrMessageEvent):
 
             # 编辑或发送消息
             if message_id and len(delta) <= self.MAX_MESSAGE_LENGTH:
-                current_time = asyncio.get_event_loop().time()
+                current_time = asyncio.get_running_loop().time()
                 time_since_last_edit = current_time - last_edit_time
 
                 if time_since_last_edit >= throttle_interval:
-                    current_time = asyncio.get_event_loop().time()
+                    current_time = asyncio.get_running_loop().time()
                     if current_time - last_chat_action_time >= chat_action_interval:
                         await self._ensure_typing(user_name, message_thread_id)
                         last_chat_action_time = current_time
@@ -674,9 +674,9 @@ class TelegramPlatformEvent(AstrMessageEvent):
                         current_content = delta
                     except Exception as e:
                         logger.warning(f"编辑消息失败(streaming): {e!s}")
-                    last_edit_time = asyncio.get_event_loop().time()
+                    last_edit_time = asyncio.get_running_loop().time()
             else:
-                current_time = asyncio.get_event_loop().time()
+                current_time = asyncio.get_running_loop().time()
                 if current_time - last_chat_action_time >= chat_action_interval:
                     await self._ensure_typing(user_name, message_thread_id)
                     last_chat_action_time = current_time
@@ -688,7 +688,7 @@ class TelegramPlatformEvent(AstrMessageEvent):
                 except Exception as e:
                     logger.warning(f"发送消息失败(streaming): {e!s}")
                 message_id = msg.message_id
-                last_edit_time = asyncio.get_event_loop().time()
+                last_edit_time = asyncio.get_running_loop().time()
 
         try:
             if delta and current_content != delta:
diff --git a/astrbot/core/platform/sources/wecom/wecom_adapter.py b/astrbot/core/platform/sources/wecom/wecom_adapter.py
index 6647db89f..410b30eea 100644
--- a/astrbot/core/platform/sources/wecom/wecom_adapter.py
+++ b/astrbot/core/platform/sources/wecom/wecom_adapter.py
@@ -200,7 +200,7 @@ class WecomPlatformAdapter(Platform):
                         return msg_list[-1]
                     return None
 
-                msg_new = await asyncio.get_event_loop().run_in_executor(
+                msg_new = await asyncio.get_running_loop().run_in_executor(
                     None,
                     get_latest_msg_item,
                 )
@@ -261,7 +261,7 @@ class WecomPlatformAdapter(Platform):
 
     @override
     async def run(self) -> None:
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
         if self.kf_name:
             try:
                 acc_list = (
@@ -339,7 +339,7 @@ class WecomPlatformAdapter(Platform):
             abm.session_id = abm.sender.user_id
             abm.raw_message = msg
         elif isinstance(msg, VoiceMessage):
-            resp: Response = await asyncio.get_event_loop().run_in_executor(
+            resp: Response = await asyncio.get_running_loop().run_in_executor(
                 None,
                 self.client.media.download,
                 msg.media_id,
@@ -395,7 +395,7 @@ class WecomPlatformAdapter(Platform):
             abm.message_str = text
         elif msgtype == "image":
             media_id = msg.get("image", {}).get("media_id", "")
-            resp: Response = await asyncio.get_event_loop().run_in_executor(
+            resp: Response = await asyncio.get_running_loop().run_in_executor(
                 None,
                 self.client.media.download,
                 media_id,
@@ -407,7 +407,7 @@ class WecomPlatformAdapter(Platform):
             abm.message = [Image(file=path, url=path)]
         elif msgtype == "voice":
             media_id = msg.get("voice", {}).get("media_id", "")
-            resp: Response = await asyncio.get_event_loop().run_in_executor(
+            resp: Response = await asyncio.get_running_loop().run_in_executor(
                 None,
                 self.client.media.download,
                 media_id,
diff --git a/astrbot/core/platform/sources/wecom_ai_bot/wecomai_queue_mgr.py b/astrbot/core/platform/sources/wecom_ai_bot/wecomai_queue_mgr.py
index 9b6e6b968..efa94b58e 100644
--- a/astrbot/core/platform/sources/wecom_ai_bot/wecomai_queue_mgr.py
+++ b/astrbot/core/platform/sources/wecom_ai_bot/wecomai_queue_mgr.py
@@ -4,6 +4,7 @@
 """
 
 import asyncio
+import time
 from collections.abc import Awaitable, Callable
 from typing import Any
 
@@ -82,7 +83,7 @@ class WecomAIQueueMgr:
             del self.pending_responses[session_id]
             logger.debug(f"[WecomAI] 移除待处理响应: {session_id}")
         if mark_finished:
-            self.completed_streams[session_id] = asyncio.get_event_loop().time()
+            self.completed_streams[session_id] = time.monotonic()
             logger.debug(f"[WecomAI] 标记流已结束: {session_id}")
 
     def remove_queue(self, session_id: str):
@@ -135,7 +136,7 @@ class WecomAIQueueMgr:
         """
         self.pending_responses[session_id] = {
             "callback_params": callback_params,
-            "timestamp": asyncio.get_event_loop().time(),
+            "timestamp": time.monotonic(),
         }
         logger.debug(f"[WecomAI] 设置待处理响应: {session_id}")
 
@@ -160,7 +161,7 @@ class WecomAIQueueMgr:
         finished_at = self.completed_streams.get(session_id)
         if finished_at is None:
             return False
-        if asyncio.get_event_loop().time() - finished_at > max_age_seconds:
+        if time.monotonic() - finished_at > max_age_seconds:
             self.completed_streams.pop(session_id, None)
             return False
         return True
@@ -172,7 +173,7 @@ class WecomAIQueueMgr:
             max_age_seconds: 最大存活时间（秒）
 
         """
-        current_time = asyncio.get_event_loop().time()
+        current_time = time.monotonic()
         expired_sessions = []
 
         for session_id, response_data in self.pending_responses.items():
diff --git a/astrbot/core/platform/sources/weixin_official_account/weixin_offacc_adapter.py b/astrbot/core/platform/sources/weixin_official_account/weixin_offacc_adapter.py
index c01355974..bb7061ca1 100644
--- a/astrbot/core/platform/sources/weixin_official_account/weixin_offacc_adapter.py
+++ b/astrbot/core/platform/sources/weixin_official_account/weixin_offacc_adapter.py
@@ -369,7 +369,7 @@ class WeixinOfficialAccountPlatformAdapter(Platform):
                 if future:
                     logger.debug(f"duplicate message id checked: {msg.id}")
                 else:
-                    future = asyncio.get_event_loop().create_future()
+                    future = asyncio.get_running_loop().create_future()
                     self.wexin_event_workers[msg_id] = future
                     await self.convert_message(msg, future)
                     # I love shield so much!
@@ -461,7 +461,7 @@ class WeixinOfficialAccountPlatformAdapter(Platform):
         elif msg.type == "voice":
             assert isinstance(msg, VoiceMessage)
 
-            resp: Response = await asyncio.get_event_loop().run_in_executor(
+            resp: Response = await asyncio.get_running_loop().run_in_executor(
                 None,
                 self.client.media.download,
                 msg.media_id,
diff --git a/astrbot/core/provider/sources/dashscope_tts.py b/astrbot/core/provider/sources/dashscope_tts.py
index 9b6816859..15e763f3e 100644
--- a/astrbot/core/provider/sources/dashscope_tts.py
+++ b/astrbot/core/provider/sources/dashscope_tts.py
@@ -87,7 +87,7 @@ class ProviderDashscopeTTSAPI(TTSProvider):
         model: str,
         text: str,
     ) -> tuple[bytes | None, str]:
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
         response = await loop.run_in_executor(None, self._call_qwen_tts, model, text)
         audio_bytes = await self._extract_audio_from_response(response)
         if not audio_bytes:
@@ -143,7 +143,7 @@ class ProviderDashscopeTTSAPI(TTSProvider):
             voice=self.voice,
             format=AudioFormat.WAV_24000HZ_MONO_16BIT,
         )
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
         audio_bytes = await loop.run_in_executor(
             None,
             synthesizer.call,
diff --git a/astrbot/core/provider/sources/genie_tts.py b/astrbot/core/provider/sources/genie_tts.py
index 8f9b6d91d..b76bf6b46 100644
--- a/astrbot/core/provider/sources/genie_tts.py
+++ b/astrbot/core/provider/sources/genie_tts.py
@@ -59,7 +59,7 @@ class GenieTTSProvider(TTSProvider):
         filename = f"genie_tts_{uuid.uuid4()}.wav"
         path = os.path.join(temp_dir, filename)
 
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
 
         def _generate(save_path: str) -> None:
             assert genie is not None
@@ -85,7 +85,7 @@ class GenieTTSProvider(TTSProvider):
         text_queue: asyncio.Queue[str | None],
         audio_queue: "asyncio.Queue[bytes | tuple[str, bytes] | None]",
     ) -> None:
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
 
         while True:
             text = await text_queue.get()
diff --git a/astrbot/core/provider/sources/sensevoice_selfhosted_source.py b/astrbot/core/provider/sources/sensevoice_selfhosted_source.py
index af6c0f631..d41ebaf62 100644
--- a/astrbot/core/provider/sources/sensevoice_selfhosted_source.py
+++ b/astrbot/core/provider/sources/sensevoice_selfhosted_source.py
@@ -43,7 +43,7 @@ class ProviderSenseVoiceSTTSelfHost(STTProvider):
         logger.info("下载或者加载 SenseVoice 模型中，这可能需要一些时间 ...")
 
         # 将模型加载放到线程池中执行
-        self.model = await asyncio.get_event_loop().run_in_executor(
+        self.model = await asyncio.get_running_loop().run_in_executor(
             None,
             lambda: SenseVoiceSmall(self.model_name, quantize=True, batch_size=16),
         )
@@ -88,7 +88,7 @@ class ProviderSenseVoiceSTTSelfHost(STTProvider):
                     audio_url = output_path
 
             # 使用 run_in_executor 来调用模型进行识别
-            loop = asyncio.get_event_loop()
+            loop = asyncio.get_running_loop()
             res = await loop.run_in_executor(
                 None,  # 使用默认的线程池
                 lambda: cast(SenseVoiceSmall, self.model)(
diff --git a/astrbot/core/provider/sources/whisper_selfhosted_source.py b/astrbot/core/provider/sources/whisper_selfhosted_source.py
index 678deb948..519a64de6 100644
--- a/astrbot/core/provider/sources/whisper_selfhosted_source.py
+++ b/astrbot/core/provider/sources/whisper_selfhosted_source.py
@@ -31,7 +31,7 @@ class ProviderOpenAIWhisperSelfHost(STTProvider):
         self.model = None
 
     async def initialize(self) -> None:
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
         logger.info("下载或者加载 Whisper 模型中，这可能需要一些时间 ...")
         self.model = await loop.run_in_executor(
             None,
@@ -50,7 +50,7 @@ class ProviderOpenAIWhisperSelfHost(STTProvider):
         return False
 
     async def get_text(self, audio_url: str) -> str:
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
 
         is_tencent = False
 
diff --git a/astrbot/core/star/star_manager.py b/astrbot/core/star/star_manager.py
index 68c58fdae..b812698f2 100644
--- a/astrbot/core/star/star_manager.py
+++ b/astrbot/core/star/star_manager.py
@@ -1374,10 +1374,23 @@ class PluginManager:
             return
 
         if "__del__" in star_metadata.star_cls_type.__dict__:
-            asyncio.get_event_loop().run_in_executor(
+            loop = asyncio.get_running_loop()
+            future = loop.run_in_executor(
                 None,
                 star_metadata.star_cls.__del__,
             )
+
+            def _log_del_exception(fut: asyncio.Future) -> None:
+                if fut.cancelled():
+                    return
+                if (exc := fut.exception()) is not None:
+                    logger.error(
+                        "插件 %s 在 __del__ 中抛出了异常：%r",
+                        star_metadata.name,
+                        exc,
+                    )
+
+            future.add_done_callback(_log_del_exception)
         elif "terminate" in star_metadata.star_cls_type.__dict__:
             await star_metadata.star_cls.terminate()
 
diff --git a/astrbot/core/utils/session_lock.py b/astrbot/core/utils/session_lock.py
index 7810d6ce4..732a29b72 100644
--- a/astrbot/core/utils/session_lock.py
+++ b/astrbot/core/utils/session_lock.py
@@ -1,9 +1,13 @@
 import asyncio
+import threading
+import weakref
 from collections import defaultdict
 from contextlib import asynccontextmanager
 
 
-class SessionLockManager:
+class _PerLoopSessionLockManager:
+    """Per-event-loop session lock manager; keeps original simple semantics."""
+
     def __init__(self) -> None:
         self._locks: dict[str, asyncio.Lock] = defaultdict(asyncio.Lock)
         self._lock_count: dict[str, int] = defaultdict(int)
@@ -26,4 +30,26 @@ class SessionLockManager:
                     self._lock_count.pop(session_id, None)
 
 
+class SessionLockManager:
+    """Thread-safe session lock manager with per-event-loop isolation."""
+
+    def __init__(self) -> None:
+        self._state_guard = threading.Lock()
+        self._loop_managers: weakref.WeakKeyDictionary[
+            asyncio.AbstractEventLoop, _PerLoopSessionLockManager
+        ] = weakref.WeakKeyDictionary()
+
+    def _get_loop_manager(self) -> _PerLoopSessionLockManager:
+        """Get the lock manager for the current event loop."""
+        loop = asyncio.get_running_loop()
+        with self._state_guard:
+            return self._loop_managers.setdefault(loop, _PerLoopSessionLockManager())
+
+    @asynccontextmanager
+    async def acquire_lock(self, session_id: str):
+        manager = self._get_loop_manager()
+        async with manager.acquire_lock(session_id):
+            yield
+
+
 session_lock_manager = SessionLockManager()
diff --git a/main.py b/main.py
index 36c46fca3..1cc900982 100644
--- a/main.py
+++ b/main.py
@@ -101,6 +101,26 @@ async def check_dashboard_files(webui_dir: str | None = None):
     return data_dist_path
 
 
+async def main_async(webui_dir_arg: str | None) -> None:
+    """主异步入口"""
+    # 检查仪表板文件
+    webui_dir = await check_dashboard_files(webui_dir_arg)
+    if webui_dir is None:
+        logger.warning(
+            "管理面板文件检查失败，WebUI 功能将不可用。"
+            "请检查网络连接或手动指定 --webui-dir 参数。"
+        )
+
+    db = db_helper
+
+    # 打印 logo
+    logger.info(logo_tmpl)
+
+    core_lifecycle = InitialLoader(db, log_broker)
+    core_lifecycle.webui_dir = webui_dir
+    await core_lifecycle.start()
+
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description="AstrBot")
     parser.add_argument(
@@ -117,14 +137,5 @@ if __name__ == "__main__":
     log_broker = LogBroker()
     LogManager.set_queue_handler(logger, log_broker)
 
-    # 检查仪表板文件
-    webui_dir = asyncio.run(check_dashboard_files(args.webui_dir))
-
-    db = db_helper
-
-    # 打印 logo
-    logger.info(logo_tmpl)
-
-    core_lifecycle = InitialLoader(db, log_broker)
-    core_lifecycle.webui_dir = webui_dir
-    asyncio.run(core_lifecycle.start())
+    # 只使用一次 asyncio.run()
+    asyncio.run(main_async(args.webui_dir))
diff --git a/tests/unit/test_session_lock.py b/tests/unit/test_session_lock.py
new file mode 100644
index 000000000..fea686b11
--- /dev/null
+++ b/tests/unit/test_session_lock.py
@@ -0,0 +1,545 @@
+"""Tests for SessionLockManager with multi-event-loop isolation."""
+
+import asyncio
+import threading
+import time
+import weakref
+from concurrent.futures import ThreadPoolExecutor
+
+import pytest
+
+from astrbot.core.utils.session_lock import SessionLockManager
+
+
+class TestSessionLockManagerBasic:
+    """Basic functionality tests."""
+
+    def test_init(self):
+        """Test manager initialization."""
+        manager = SessionLockManager()
+        assert manager._state_guard is not None
+        assert manager._loop_managers is not None
+
+    @pytest.mark.asyncio
+    async def test_acquire_release_lock(self):
+        """Test basic lock acquire and release."""
+        manager = SessionLockManager()
+        session_id = "test-session"
+
+        async with manager.acquire_lock(session_id):
+            # Lock acquired successfully
+            pass
+
+        # Lock should be released and cleaned up
+        state = manager._get_loop_manager()
+        assert session_id not in state._locks
+        assert session_id not in state._lock_count
+
+    @pytest.mark.asyncio
+    async def test_lock_is_reusable(self):
+        """Test that locks can be acquired multiple times."""
+        manager = SessionLockManager()
+        session_id = "test-session"
+
+        async with manager.acquire_lock(session_id):
+            pass
+
+        async with manager.acquire_lock(session_id):
+            pass
+
+        # Both acquisitions should succeed
+
+
+class TestCrossLoopIsolation:
+    """Tests for event loop isolation."""
+
+    @pytest.mark.asyncio
+    async def test_different_loops_have_different_managers(self):
+        """Test that different event loops get different per-loop managers."""
+        manager = SessionLockManager()
+
+        # Get manager for current loop
+        manager1 = manager._get_loop_manager()
+
+        # Run in a different event loop
+        def run_in_new_loop():
+            new_loop = asyncio.new_event_loop()
+            try:
+                asyncio.set_event_loop(new_loop)
+
+                async def get_manager():
+                    return manager._get_loop_manager()
+
+                return new_loop.run_until_complete(get_manager())
+            finally:
+                new_loop.close()
+                asyncio.set_event_loop(None)
+
+        with ThreadPoolExecutor(max_workers=1) as executor:
+            future = executor.submit(run_in_new_loop)
+            manager2 = future.result()
+
+        # Should be different manager instances
+        assert manager1 is not manager2
+
+    @pytest.mark.asyncio
+    async def test_locks_isolated_across_loops(self):
+        """Test that locks from different loops are isolated."""
+        manager = SessionLockManager()
+        session_id = "shared-session"
+        results = []
+
+        async def acquire_in_loop(loop_id: int):
+            """Acquire lock in a new event loop."""
+            async with manager.acquire_lock(session_id):
+                results.append(f"loop-{loop_id}-acquired")
+                await asyncio.sleep(0.05)
+                results.append(f"loop-{loop_id}-released")
+
+        def run_in_thread(loop_id: int):
+            loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(loop)
+            try:
+                loop.run_until_complete(acquire_in_loop(loop_id))
+            finally:
+                loop.close()
+                asyncio.set_event_loop(None)
+
+        # Run two loops concurrently - they should NOT block each other
+        # because locks are isolated per-loop
+        with ThreadPoolExecutor(max_workers=2) as executor:
+            futures = [executor.submit(run_in_thread, i) for i in range(2)]
+            for f in futures:
+                f.result()
+
+        # Both loops should acquire immediately (no blocking between loops)
+        # Order should show interleaved acquisitions, not sequential
+        assert len(results) == 4
+
+    @pytest.mark.asyncio
+    async def test_same_loop_blocks_on_same_session(self):
+        """Test that same loop blocks when acquiring same session lock."""
+        manager = SessionLockManager()
+        session_id = "test-session"
+        execution_order = []
+
+        async def task1():
+            async with manager.acquire_lock(session_id):
+                execution_order.append("task1-start")
+                await asyncio.sleep(0.1)
+                execution_order.append("task1-end")
+
+        async def task2():
+            await asyncio.sleep(0.01)  # Let task1 start first
+            async with manager.acquire_lock(session_id):
+                execution_order.append("task2-start")
+                execution_order.append("task2-end")
+
+        await asyncio.gather(task1(), task2())
+
+        # task2 should wait for task1 to finish
+        assert execution_order.index("task1-start") < execution_order.index("task1-end")
+        assert execution_order.index("task1-end") < execution_order.index("task2-start")
+
+
+class TestConcurrency:
+    """Tests for concurrent access."""
+
+    @pytest.mark.asyncio
+    async def test_concurrent_acquisitions_same_loop(self):
+        """Test concurrent lock acquisitions on the same loop."""
+        manager = SessionLockManager()
+        session_id = "concurrent-session"
+        acquired_count = 0
+        max_concurrent = 0
+        lock = asyncio.Lock()
+
+        async def acquire_and_check():
+            nonlocal acquired_count, max_concurrent
+            async with manager.acquire_lock(session_id):
+                async with lock:
+                    acquired_count += 1
+                    max_concurrent = max(max_concurrent, acquired_count)
+                await asyncio.sleep(0.01)
+                async with lock:
+                    acquired_count -= 1
+
+        # Run multiple concurrent tasks
+        tasks = [acquire_and_check() for _ in range(5)]
+        await asyncio.gather(*tasks)
+
+        # Max concurrent should be 1 (lock serializes access)
+        assert max_concurrent == 1
+
+    @pytest.mark.asyncio
+    async def test_thread_safety_of_loop_manager_creation(self):
+        """Test that _get_loop_manager is thread-safe."""
+        manager = SessionLockManager()
+        managers = []
+        errors = []
+
+        def create_loop_and_get_manager():
+            loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(loop)
+            try:
+
+                async def get_mgr():
+                    return manager._get_loop_manager()
+
+                mgr = loop.run_until_complete(get_mgr())
+                managers.append(mgr)
+            except Exception as e:
+                errors.append(e)
+            finally:
+                loop.close()
+                asyncio.set_event_loop(None)
+
+        threads = [threading.Thread(target=create_loop_and_get_manager) for _ in range(10)]
+        for t in threads:
+            t.start()
+        for t in threads:
+            t.join()
+
+        assert len(errors) == 0
+        # All managers should be valid
+        for m in managers:
+            assert hasattr(m, "_locks")
+            assert hasattr(m, "_access_lock")
+
+
+class TestEventLoopCleanup:
+    """Tests for event loop cleanup behavior."""
+
+    @pytest.mark.asyncio
+    async def test_weakref_cleanup_on_loop_close(self):
+        """Test that per-loop managers are cleaned up when loop is closed."""
+        manager = SessionLockManager()
+        loop_ref: weakref.ref[asyncio.AbstractEventLoop] | None = None
+
+        def run_in_new_loop():
+            nonlocal loop_ref
+            loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(loop)
+            loop_ref = weakref.ref(loop)
+
+            async def use_lock():
+                async with manager.acquire_lock("test-session"):
+                    pass
+                return manager._get_loop_manager()
+
+            try:
+                per_loop_mgr = loop.run_until_complete(use_lock())
+                # Keep a weak ref to the per-loop manager
+                return weakref.ref(per_loop_mgr)
+            finally:
+                loop.close()
+                asyncio.set_event_loop(None)
+
+        with ThreadPoolExecutor(max_workers=1) as executor:
+            future = executor.submit(run_in_new_loop)
+            per_loop_mgr_ref = future.result()
+
+        # Give time for weakref cleanup
+        import gc
+
+        gc.collect()
+
+        # The per-loop manager should be cleaned up when the loop is closed
+        # because WeakKeyDictionary removes entries when the key (loop) is gone
+        per_loop_mgr = per_loop_mgr_ref()
+        loop = loop_ref() if loop_ref is not None else None
+        assert per_loop_mgr is None or loop is None
+
+    @pytest.mark.asyncio
+    async def test_access_after_loop_close_in_new_loop_works(self):
+        """Test that accessing from a new loop after old loop closes works."""
+        manager = SessionLockManager()
+
+        # Use lock in current loop
+        async with manager.acquire_lock("session-1"):
+            pass
+
+        # Simulate old loop being closed and new loop being created
+        def run_in_new_loop():
+            loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(loop)
+            try:
+
+                async def use_lock():
+                    # Should work without issues in new loop
+                    async with manager.acquire_lock("session-2"):
+                        return "success"
+
+                return loop.run_until_complete(use_lock())
+            finally:
+                loop.close()
+                asyncio.set_event_loop(None)
+
+        with ThreadPoolExecutor(max_workers=1) as executor:
+            future = executor.submit(run_in_new_loop)
+            result = future.result()
+
+        assert result == "success"
+
+
+class TestIssue5464:
+    """Tests for issue #5464: Multiple OneBot instances with different event loops.
+
+    Issue: Running multiple OneBot adapter instances causes
+    "is bound to a different event loop" error.
+    """
+
+    @pytest.mark.asyncio
+    async def test_multiple_event_loops_no_cross_loop_error(self):
+        """Test that multiple event loops don't cause cross-loop binding errors.
+
+        This simulates the scenario where multiple OneBot instances
+        (each potentially running in different event loops) access the
+        same SessionLockManager concurrently.
+        """
+        from astrbot.core.utils.session_lock import session_lock_manager
+
+        errors: list[Exception] = []
+        results: list[str] = []
+
+        def simulate_onebot_instance(instance_id: int, session_ids: list[str]):
+            """Simulate a OneBot instance running in its own event loop."""
+            loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(loop)
+            try:
+
+                async def process_messages():
+                    for session_id in session_ids:
+                        try:
+                            async with session_lock_manager.acquire_lock(session_id):
+                                # Simulate message processing
+                                await asyncio.sleep(0.01)
+                                results.append(f"instance-{instance_id}-{session_id}")
+                        except Exception as e:
+                            errors.append(e)
+
+                loop.run_until_complete(process_messages())
+            finally:
+                loop.close()
+                asyncio.set_event_loop(None)
+
+        # Simulate 4 OneBot instances (as in the issue report)
+        # Each handles multiple sessions concurrently
+        threads = []
+        for i in range(4):
+            sessions = [f"session-{i}-1", f"session-{i}-2", f"session-{i}-3"]
+            t = threading.Thread(target=simulate_onebot_instance, args=(i, sessions))
+            threads.append(t)
+
+        for t in threads:
+            t.start()
+        for t in threads:
+            t.join()
+
+        # Should have no errors (especially no "bound to a different event loop")
+        assert len(errors) == 0, f"Errors occurred: {errors}"
+        assert len(results) == 12  # 4 instances * 3 sessions each
+
+    @pytest.mark.asyncio
+    async def test_lock_object_not_shared_across_loops(self):
+        """Verify that asyncio.Lock objects are not shared across event loops.
+
+        The root cause of issue #5464 was that Lock objects created in one
+        event loop were being used in another, causing the error.
+        """
+        manager = SessionLockManager()
+        session_id = "shared-session-id"
+        lock_ids: set[int] = set()
+        lock_id_lock = threading.Lock()
+
+        def get_lock_in_new_loop():
+            loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(loop)
+            try:
+
+                async def acquire_and_capture():
+                    # Get the per-loop manager
+                    per_loop_mgr = manager._get_loop_manager()
+                    # Capture the lock object id before acquiring
+                    async with per_loop_mgr._access_lock:
+                        lock = per_loop_mgr._locks[session_id]
+                        with lock_id_lock:
+                            lock_ids.add(id(lock))
+                    async with manager.acquire_lock(session_id):
+                        await asyncio.sleep(0.01)
+
+                loop.run_until_complete(acquire_and_capture())
+            finally:
+                loop.close()
+                asyncio.set_event_loop(None)
+
+        # Run multiple loops concurrently
+        threads = [threading.Thread(target=get_lock_in_new_loop) for _ in range(5)]
+        for t in threads:
+            t.start()
+        for t in threads:
+            t.join()
+
+        # Each loop should have its own Lock object
+        # If locks were shared, we'd only have 1 lock_id
+        assert len(lock_ids) == 5, "Each event loop should have its own Lock object"
+
+    @pytest.mark.asyncio
+    async def test_concurrent_access_same_session_different_loops(self):
+        """Test that same session ID accessed from different loops doesn't block.
+
+        This verifies the fix: locks are isolated per event loop,
+        so different loops can acquire the "same" session lock concurrently.
+        """
+        from astrbot.core.utils.session_lock import session_lock_manager
+
+        session_id = "global-session"
+        acquisition_times: list[float] = []
+        time_lock = threading.Lock()
+
+        def acquire_lock_in_loop(loop_id: int):
+            loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(loop)
+            try:
+
+                async def acquire():
+                    import time
+
+                    start = time.time()
+                    async with session_lock_manager.acquire_lock(session_id):
+                        with time_lock:
+                            acquisition_times.append(start)
+                        await asyncio.sleep(0.1)  # Hold the lock
+
+                loop.run_until_complete(acquire())
+            finally:
+                loop.close()
+                asyncio.set_event_loop(None)
+
+        # Start 3 threads nearly simultaneously
+        threads = [threading.Thread(target=acquire_lock_in_loop, args=(i,)) for i in range(3)]
+
+        start_time = time.time()
+        for t in threads:
+            t.start()
+        for t in threads:
+            t.join()
+        total_time = time.time() - start_time
+
+        # If locks were NOT isolated, we'd need ~0.3s (3 * 0.1s serial)
+        # With isolation, all should complete in ~0.1s (parallel)
+        # Allow some overhead, but should be much less than 0.3s
+        assert total_time < 0.25, (
+            f"Locks should be isolated per loop, but took {total_time:.2f}s"
+        )
+
+
+class TestEdgeCases:
+    """Tests for edge cases."""
+
+    @pytest.mark.asyncio
+    async def test_empty_session_id(self):
+        """Test with empty session ID."""
+        manager = SessionLockManager()
+
+        async with manager.acquire_lock(""):
+            pass
+
+        # Should work without issues
+
+    @pytest.mark.asyncio
+    async def test_special_characters_in_session_id(self):
+        """Test with special characters in session ID."""
+        manager = SessionLockManager()
+        session_id = "session-with-special-chars!@#$%^&*()"
+
+        async with manager.acquire_lock(session_id):
+            pass
+
+        # Should work without issues
+
+    @pytest.mark.asyncio
+    async def test_very_long_session_id(self):
+        """Test with very long session ID."""
+        manager = SessionLockManager()
+        session_id = "a" * 10000
+
+        async with manager.acquire_lock(session_id):
+            pass
+
+        # Should work without issues
+
+    @pytest.mark.asyncio
+    async def test_lock_not_held_after_context_exit(self):
+        """Test that lock is released after context manager exit."""
+        manager = SessionLockManager()
+        session_id = "test-session"
+
+        async with manager.acquire_lock(session_id):
+            state = manager._get_loop_manager()
+            # Lock should exist and have count 1
+            assert session_id in state._locks
+            assert state._lock_count[session_id] == 1
+
+        # After exit, lock should be cleaned up
+        state = manager._get_loop_manager()
+        assert session_id not in state._locks
+        assert session_id not in state._lock_count
+
+    @pytest.mark.asyncio
+    async def test_exception_during_lock(self):
+        """Test that lock is released even if exception occurs."""
+        manager = SessionLockManager()
+        session_id = "test-session"
+
+        with pytest.raises(ValueError):
+            async with manager.acquire_lock(session_id):
+                raise ValueError("test error")
+
+        # Lock should still be released
+        state = manager._get_loop_manager()
+        assert session_id not in state._locks
+        assert session_id not in state._lock_count
+
+    @pytest.mark.asyncio
+    async def test_nested_lock_different_sessions(self):
+        """Test nested locks on different sessions."""
+        manager = SessionLockManager()
+
+        async with manager.acquire_lock("session-1"):
+            async with manager.acquire_lock("session-2"):
+                state = manager._get_loop_manager()
+                assert "session-1" in state._locks
+                assert "session-2" in state._locks
+                assert state._lock_count["session-1"] == 1
+                assert state._lock_count["session-2"] == 1
+
+        state = manager._get_loop_manager()
+        assert "session-1" not in state._locks
+        assert "session-2" not in state._locks
+
+    @pytest.mark.asyncio
+    async def test_reentrant_lock_same_session(self):
+        """Test reentrant locking on same session (should block)."""
+        manager = SessionLockManager()
+        session_id = "test-session"
+        order = []
+
+        async def outer():
+            async with manager.acquire_lock(session_id):
+                order.append("outer-acquired")
+                await asyncio.sleep(0.1)
+                order.append("outer-done")
+
+        async def inner():
+            await asyncio.sleep(0.01)  # Let outer acquire first
+            order.append("inner-attempt")
+            async with manager.acquire_lock(session_id):
+                order.append("inner-acquired")
+                order.append("inner-done")
+
+        await asyncio.gather(outer(), inner())
+
+        # Inner should wait for outer to complete
+        assert order.index("outer-acquired") < order.index("outer-done")
+        assert order.index("outer-done") < order.index("inner-acquired")