diff --git a/plugins/maibot_adapter/main.py b/plugins/maibot_adapter/main.py
index 951c760..8ff2e18 100644
--- a/plugins/maibot_adapter/main.py
+++ b/plugins/maibot_adapter/main.py
@@ -361,6 +361,19 @@ class MaiBotAdapterPlugin(MessagePluginInterface):
             "payload": payload["api_message"],
         }
 
+        # 发送前打印 message_info 快照：
+        # 1. 当前“MaiBot 侧仍显示私聊”的排障核心是确认 group_info 是否真实入包；
+        # 2. 仅打印 message_info，不输出 message_segment 正文，避免无意义扩大日志；
+        # 3. 保留 ensure_ascii=False 便于直接查看中文群名/昵称。
+        try:
+            message_info_snapshot = json.dumps(
+                (payload.get("api_message") or {}).get("message_info") or {},
+                ensure_ascii=False,
+            )
+            self._log_runtime(f"[{self.name}] 发送前 message_info={message_info_snapshot}")
+        except Exception as exc:
+            self.LOG.warning(f"[{self.name}] message_info 序列化失败，跳过快照日志: {exc}")
+
         await websocket.send_json(package)
         self._log_runtime(
             f"[{self.name}] 已发送到 MaiBot: roomid={payload['roomid']}, sender={payload['sender']}, "