diff --git a/lib/pages/chat/chat.dart b/lib/pages/chat/chat.dart
index 41afabb94..e82620509 100644
--- a/lib/pages/chat/chat.dart
+++ b/lib/pages/chat/chat.dart
@@ -445,6 +445,7 @@ class ChatController extends State<ChatPageWithRoom>
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
     if (state != AppLifecycleState.resumed) return;
+    if (!mounted) return;
     setReadMarker();
   }