diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index fa3e2b90b..51ec941c9 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -906,10 +906,23 @@ async function insertEmoji(ev: MouseEvent) {
 	textAreaReadOnly.value = true;
 	const target = ev.currentTarget ?? ev.target;
 	if (target == null) return;
+
+	// emojiPickerはダイアログが閉じずにtextareaとやりとりするので、
+	// focustrapをかけているとinsertTextAtCursorが効かない
+	// そのため、投稿フォームのテキストに直接注入する
+	// See: https://github.com/misskey-dev/misskey/pull/14282
+	//      https://github.com/misskey-dev/misskey/issues/14274
+
+	let pos = textareaEl.value?.selectionStart ?? 0;
+	let posEnd = textareaEl.value?.selectionEnd ?? text.value.length;
 	emojiPicker.show(
 		target as HTMLElement,
 		emoji => {
-			insertTextAtCursor(textareaEl.value, emoji);
+			const textBefore = text.value.substring(0, pos);
+			const textAfter = text.value.substring(posEnd);
+			text.value = textBefore + emoji + textAfter;
+			pos += emoji.length;
+			posEnd += emoji.length;
 		},
 		() => {
 			textAreaReadOnly.value = false;