diff --git a/lib/pages/main/view.dart b/lib/pages/main/view.dart
index fc5f2498b..8017f61a7 100644
--- a/lib/pages/main/view.dart
+++ b/lib/pages/main/view.dart
@@ -65,12 +65,19 @@ class _MainAppState extends State<MainApp>
 
   @override
   void didPopNext() {
+    WidgetsBinding.instance.addObserver(this);
     _mainController.checkUnreadDynamic();
     _checkDefaultSearch(true);
     _checkUnread(context.orientation == Orientation.portrait);
     super.didPopNext();
   }
 
+  @override
+  void didPushNext() {
+    WidgetsBinding.instance.removeObserver(this);
+    super.didPushNext();
+  }
+
   @override
   void didChangeAppLifecycleState(AppLifecycleState state) {
     if (state == AppLifecycleState.resumed) {
diff --git a/lib/pages/video/detail/introduction/view.dart b/lib/pages/video/detail/introduction/view.dart
index 0bd64d28d..9a6287858 100644
--- a/lib/pages/video/detail/introduction/view.dart
+++ b/lib/pages/video/detail/introduction/view.dart
@@ -1003,7 +1003,7 @@ class _VideoInfoState extends State<VideoInfo> with TickerProviderStateMixin {
         case 1:
           final List<InlineSpan> spanChildren = <InlineSpan>[];
           final RegExp urlRegExp = RegExp(
-            '${Constants.urlPattern}|av\\d+|bv\\S+\\b',
+            '${Constants.urlPattern}|av\\d+|bv[a-z\\d]{10}',
             caseSensitive: false,
           );
 
@@ -1030,7 +1030,7 @@ class _VideoInfoState extends State<VideoInfo> with TickerProviderStateMixin {
                 } catch (e) {
                   spanChildren.add(TextSpan(text: matchStr));
                 }
-              } else if (RegExp(r'^bv\S+\b$', caseSensitive: false)
+              } else if (RegExp(r'^bv[a-z\d]{10}$', caseSensitive: false)
                   .hasMatch(matchStr)) {
                 try {
                   // validate
diff --git a/lib/pages/video/detail/view.dart b/lib/pages/video/detail/view.dart
index 53ded2562..fc894d90c 100644
--- a/lib/pages/video/detail/view.dart
+++ b/lib/pages/video/detail/view.dart
@@ -393,6 +393,8 @@ class _VideoDetailPageState extends State<VideoDetailPage>
       return;
     }
 
+    WidgetsBinding.instance.removeObserver(this);
+
     ScreenBrightness().resetApplicationScreenBrightness();
 
     videoDetailController.positionSubscription?.cancel();
@@ -426,6 +428,8 @@ class _VideoDetailPageState extends State<VideoDetailPage>
       return;
     }
 
+    WidgetsBinding.instance.addObserver(this);
+
     if (videoDetailController.plPlayerController.playerStatus.status.value ==
             PlayerStatus.playing &&
         videoDetailController.playerStatus != PlayerStatus.playing) {