diff --git a/astrbot/core/message/components.py b/astrbot/core/message/components.py
index 7a6284a83..781dfafca 100644
--- a/astrbot/core/message/components.py
+++ b/astrbot/core/message/components.py
@@ -193,6 +193,7 @@ class Record(BaseMessageComponent):
             bs64_data = file_to_base64(self.file)
         else:
             raise Exception(f"not a valid file: {self.file}")
+        bs64_data = bs64_data.removeprefix("base64://")
         return bs64_data
 
 
@@ -397,6 +398,7 @@ class Image(BaseMessageComponent):
             bs64_data = file_to_base64(url)
         else:
             raise Exception(f"not a valid file: {url}")
+        bs64_data = bs64_data.removeprefix("base64://")
         return bs64_data
 
 
diff --git a/astrbot/core/pipeline/process_stage/method/llm_request.py b/astrbot/core/pipeline/process_stage/method/llm_request.py
index 617e458c8..fd70275d8 100644
--- a/astrbot/core/pipeline/process_stage/method/llm_request.py
+++ b/astrbot/core/pipeline/process_stage/method/llm_request.py
@@ -146,8 +146,12 @@ class LLMRequestSubStage(Stage):
         ):
             logger.debug("上下文长度超过限制，将截断。")
             req.contexts = req.contexts[
-                -(self.max_context_length - self.dequeue_context_length) * 2 :
+                -(self.max_context_length - self.dequeue_context_length + 1) * 2 :
             ]
+            # 找到第一个role 为 user 的索引，确保上下文格式正确
+            index = next((i for i, item in enumerate(req.contexts) if item.get("role") == "user"), None)
+            if index is not None and index > 0:
+                req.contexts = req.contexts[index:]
 
         # session_id
         if not req.session_id:
diff --git a/astrbot/core/pipeline/respond/stage.py b/astrbot/core/pipeline/respond/stage.py
index 4f8db2623..be13370f4 100644
--- a/astrbot/core/pipeline/respond/stage.py
+++ b/astrbot/core/pipeline/respond/stage.py
@@ -202,6 +202,7 @@ class RespondStage(Stage):
                 try:
                     await event.send(result)
                 except Exception as e:
+                    logger.error(traceback.format_exc())
                     logger.error(f"发送消息失败: {e} chain: {result.chain}")
             await event._post_send()
             logger.info(
diff --git a/astrbot/core/platform/sources/lark/lark_event.py b/astrbot/core/platform/sources/lark/lark_event.py
index ae0d55ab7..48c7c8d14 100644
--- a/astrbot/core/platform/sources/lark/lark_event.py
+++ b/astrbot/core/platform/sources/lark/lark_event.py
@@ -2,7 +2,10 @@ import asyncio
 import json
 import re
 import uuid
+import base64
 import lark_oapi as lark
+
+from io import BytesIO
 from typing import List, AsyncGenerator
 from astrbot.api.event import AstrMessageEvent, MessageChain
 from astrbot.api.message_components import Plain, Image as AstrBotImage, At
@@ -29,22 +32,32 @@ class LarkMessageEvent(AstrMessageEvent):
                 _stage.append({"tag": "at", "user_id": comp.qq, "style": []})
             elif isinstance(comp, AstrBotImage):
                 file_path = ""
+                image_file = None
+
                 if comp.file and comp.file.startswith("file:///"):
                     file_path = comp.file.replace("file:///", "")
                 elif comp.file and comp.file.startswith("http"):
                     image_file_path = await download_image_by_url(comp.file)
                     file_path = image_file_path
                 elif comp.file and comp.file.startswith("base64://"):
-                    pass
+                    base64_str = comp.file.removeprefix("base64://")
+                    image_data = base64.b64decode(base64_str)
+                    # save as temp file
+                    file_path = f"data/temp/{uuid.uuid4()}_test.jpg"
+                    with open(file_path, "wb") as f:
+                        f.write(BytesIO(image_data).getvalue())
                 else:
                     file_path = comp.file
 
+                if image_file is None:
+                    image_file = open(file_path, "rb")
+
                 request = (
                     CreateImageRequest.builder()
                     .request_body(
                         CreateImageRequestBody.builder()
                         .image_type("message")
-                        .image(open(file_path, "rb"))
+                        .image(image_file)
                         .build()
                     )
                     .build()
@@ -53,7 +66,7 @@ class LarkMessageEvent(AstrMessageEvent):
                 if not response.success():
                     logger.error(f"无法上传飞书图片({response.code}): {response.msg}")
                 image_key = response.data.image_key
-                print(image_key)
+                logger.debug(image_key)
                 ret.append(_stage)
                 ret.append([{"tag": "img", "image_key": image_key}])
                 _stage.clear()
diff --git a/astrbot/core/utils/shared_preferences.py b/astrbot/core/utils/shared_preferences.py
index fc0bf7434..33a681419 100644
--- a/astrbot/core/utils/shared_preferences.py
+++ b/astrbot/core/utils/shared_preferences.py
@@ -8,11 +8,12 @@ class SharedPreferences:
         self._data = self._load_preferences()
 
     def _load_preferences(self):
-        try:
-            with open(self.path, "r") as f:
-                return json.load(f)
-        except json.JSONDecodeError:
-            os.remove(self.path)
+        if os.path.exists(self.path):
+            try:
+                with open(self.path, "r") as f:
+                    return json.load(f)
+            except json.JSONDecodeError:
+                os.remove(self.path)
         return {}
 
     def _save_preferences(self):