diff --git a/astrbot/core/platform/message_session.py b/astrbot/core/platform/message_session.py
index bca5300b8..982a844c2 100644
--- a/astrbot/core/platform/message_session.py
+++ b/astrbot/core/platform/message_session.py
@@ -23,7 +23,7 @@ def __post_init__(self):
 
     @staticmethod
     def from_str(session_str: str):
-        platform_id, message_type, session_id = session_str.split(":")
+        platform_id, message_type, session_id = session_str.split(":", 2)
         return MessageSession(platform_id, MessageType(message_type), session_id)