diff --git a/packages/devtools_app/lib/src/extensions/embedded/_view_web.dart b/packages/devtools_app/lib/src/extensions/embedded/_view_web.dart
index 02c0cf1740f..47cce6525b5 100644
--- a/packages/devtools_app/lib/src/extensions/embedded/_view_web.dart
+++ b/packages/devtools_app/lib/src/extensions/embedded/_view_web.dart
@@ -314,6 +314,8 @@ class _ExtensionIFrameController extends DisposableController
         '${showBannerMessageEvent.messageId}',
       ),
       screenId: '${showBannerMessageEvent.extensionName}_ext',
+      dismissOnConnectionChanges:
+          showBannerMessageEvent.dismissOnConnectionChanges,
       buildTextSpans:
           (_) => [
             TextSpan(
diff --git a/packages/devtools_app/lib/src/framework/observer/memory_observer.dart b/packages/devtools_app/lib/src/framework/observer/memory_observer.dart
index fa251a28b8d..148f86686cc 100644
--- a/packages/devtools_app/lib/src/framework/observer/memory_observer.dart
+++ b/packages/devtools_app/lib/src/framework/observer/memory_observer.dart
@@ -151,6 +151,7 @@ class _MemoryPressureBannerMessage extends banner_messages.BannerWarning {
     : super(
         screenId: banner_messages.universalScreenId,
         key: _messageKey,
+        dismissOnConnectionChanges: false,
         buildTextSpans: (context) {
           final limitAsBytes = convertBytes(
             MemoryObserver._memoryPressureLimitGb,
diff --git a/packages/devtools_app/lib/src/shared/managers/banner_messages.dart b/packages/devtools_app/lib/src/shared/managers/banner_messages.dart
index 627c540b8e1..5d468e4e6db 100644
--- a/packages/devtools_app/lib/src/shared/managers/banner_messages.dart
+++ b/packages/devtools_app/lib/src/shared/managers/banner_messages.dart
@@ -30,7 +30,33 @@ const _cpuSamplingRateDocsUrl =
 /// every screen from the [BannerMessages] widget.
 const universalScreenId = 'universal';
 
-class BannerMessagesController {
+class BannerMessagesController extends DisposableController
+    with AutoDisposeControllerMixin {
+  BannerMessagesController() {
+    previouslyConnected =
+        serviceConnection.serviceManager.connectedState.value.connected;
+    addAutoDisposeListener(serviceConnection.serviceManager.connectedState, () {
+      final connected =
+          serviceConnection.serviceManager.connectedState.value.connected;
+      if (previouslyConnected != connected) {
+        for (final messageList in _messages.values) {
+          for (final message in messageList.value) {
+            if (message.dismissOnConnectionChanges) {
+              bannerMessages.removeMessage(message);
+            }
+          }
+        }
+      }
+      previouslyConnected = connected;
+    });
+  }
+
+  /// Tracks the previous app connection state for the purpose of dismissing
+  /// messages upon connection changes.
+  ///
+  /// See [BannerMessage.dismissOnConnectionChanges].
+  bool previouslyConnected = false;
+
   final _messages = <String, ListValueNotifier<BannerMessage>>{};
   final _dismissedMessageKeys = <Key?>{};
 
@@ -165,6 +191,7 @@ class BannerMessage extends StatelessWidget {
     required this.buildTextSpans,
     required this.screenId,
     required this.messageType,
+    this.dismissOnConnectionChanges = true,
     this.buildActions,
   });
 
@@ -173,6 +200,9 @@ class BannerMessage extends StatelessWidget {
   final String screenId;
   final BannerMessageType messageType;
 
+  /// Whether this message should be dismissed on app connection changes.
+  final bool dismissOnConnectionChanges;
+
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
@@ -284,6 +314,7 @@ class BannerWarning extends BannerMessage {
     required super.key,
     required super.buildTextSpans,
     required super.screenId,
+    super.dismissOnConnectionChanges = true,
     super.buildActions,
   }) : super(messageType: BannerMessageType.warning);
 }
@@ -293,6 +324,7 @@ class BannerInfo extends BannerMessage {
     required super.key,
     required super.buildTextSpans,
     required super.screenId,
+    super.dismissOnConnectionChanges = true,
     super.buildActions,
   }) : super(messageType: BannerMessageType.info);
 }
@@ -322,23 +354,6 @@ class DebugModePerformanceMessage extends BannerWarning {
       );
 }
 
-class ProviderUnknownErrorBanner extends _BannerError {
-  ProviderUnknownErrorBanner({required super.screenId})
-    : super(
-        key: Key('ProviderUnknownErrorBanner - $screenId'),
-        buildTextSpans:
-            (_) => [
-              TextSpan(
-                text: '''
-DevTools failed to connect with package:provider.
-
-This could be caused by an older version of package:provider; please make sure that you are using version >=5.0.0.''',
-                style: TextStyle(fontSize: defaultFontSize),
-              ),
-            ],
-      );
-}
-
 class ShaderJankMessage extends _BannerError {
   ShaderJankMessage({
     required super.screenId,
@@ -520,7 +535,6 @@ class WelcomeToNewInspectorMessage extends BannerInfo {
   WelcomeToNewInspectorMessage({required super.screenId})
     : super(
         key: Key('WelcomeToNewInspectorMessage - $screenId'),
-
         buildTextSpans:
             (context) => [
               const TextSpan(
diff --git a/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md b/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md
index aae3a2f89c1..5673a98406e 100644
--- a/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md
+++ b/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md
@@ -17,6 +17,7 @@ To learn more about DevTools, check out the
 
 - Prevent web apps from remaining paused after triggering a hot-restart from
 DevTools. - [#9125](https://github.com/flutter/devtools/pull/9125)
+- Dismiss stale banner messages when the connected app state changes. - [#9148](https://github.com/flutter/devtools/pull/9148)
 
 ## Inspector updates
 
diff --git a/packages/devtools_app/test/framework/observer/memory_observer_test.dart b/packages/devtools_app/test/framework/observer/memory_observer_test.dart
index fba17a54b54..0679976c6e5 100644
--- a/packages/devtools_app/test/framework/observer/memory_observer_test.dart
+++ b/packages/devtools_app/test/framework/observer/memory_observer_test.dart
@@ -46,6 +46,7 @@ void main() {
         debugMeasureUsageInBytes: testMeasureMemoryUsage,
         pollingDuration: const Duration(milliseconds: 1),
       );
+      setGlobal(ServiceConnectionManager, FakeServiceConnectionManager());
       setGlobal(BannerMessagesController, BannerMessagesController());
       offlineDataController = MockOfflineDataController();
       offlineDataController.showingOfflineData.value = false;
diff --git a/packages/devtools_app/test/screens/memory/framework/memory_screen_test.dart b/packages/devtools_app/test/screens/memory/framework/memory_screen_test.dart
index e47552fb7da..79befb2bf5c 100644
--- a/packages/devtools_app/test/screens/memory/framework/memory_screen_test.dart
+++ b/packages/devtools_app/test/screens/memory/framework/memory_screen_test.dart
@@ -87,10 +87,10 @@ void main() {
       setGlobal(OfflineDataController, OfflineDataController());
       setGlobal(IdeTheme, IdeTheme());
       setGlobal(NotificationService, NotificationService());
-      setGlobal(BannerMessagesController, BannerMessagesController());
       setGlobal(DTDManager, MockDTDManager());
       setGlobal(ScriptManager, MockScriptManager());
       setUpServiceManagerForMemory();
+      setGlobal(BannerMessagesController, BannerMessagesController());
     });
 
     testWidgets('builds its tab', (WidgetTester tester) async {
diff --git a/packages/devtools_app/test/screens/performance/performance_screen_test.dart b/packages/devtools_app/test/screens/performance/performance_screen_test.dart
index 20c02224080..8c93288bb13 100644
--- a/packages/devtools_app/test/screens/performance/performance_screen_test.dart
+++ b/packages/devtools_app/test/screens/performance/performance_screen_test.dart
@@ -37,6 +37,7 @@ void main() {
     setGlobal(PreferencesController, PreferencesController());
     setGlobal(OfflineDataController, OfflineDataController());
     setGlobal(NotificationService, NotificationService());
+    setGlobal(ServiceConnectionManager, FakeServiceConnectionManager());
     setGlobal(BannerMessagesController, BannerMessagesController());
   });
 
diff --git a/packages/devtools_app/test/shared/managers/banner_messages_test.dart b/packages/devtools_app/test/shared/managers/banner_messages_test.dart
index 8bbc62ea0c2..dedf7e206cb 100644
--- a/packages/devtools_app/test/shared/managers/banner_messages_test.dart
+++ b/packages/devtools_app/test/shared/managers/banner_messages_test.dart
@@ -160,6 +160,32 @@ void main() {
         expect(find.byKey(k1), findsOneWidget);
       },
     );
+
+    testWidgets('messages dismiss on connection changes', (
+      WidgetTester tester,
+    ) async {
+      expect(
+        fakeServiceConnection.serviceManager.connectedState.value.connected,
+        true,
+      );
+      await tester.pumpWidget(buildBannerMessages());
+      expect(find.byKey(k1), findsNothing);
+      expect(find.byKey(k2), findsNothing);
+
+      // Add a message that should dismiss on connection changes.
+      bannerMessages.addMessage(testMessage1);
+      // Add a message that should not dismiss on connection changes.
+      bannerMessages.addMessage(testMessageNoDismiss);
+      await pumpTestFrame(tester);
+      expect(find.byKey(k1), findsOneWidget);
+      expect(find.byKey(k2), findsOneWidget);
+
+      // Simulate a connection loss.
+      await fakeServiceConnection.serviceManager.manuallyDisconnect();
+      await pumpTestFrame(tester);
+      expect(find.byKey(k1), findsNothing);
+      expect(find.byKey(k2), findsOneWidget);
+    });
   });
 }
 
@@ -184,6 +210,14 @@ final testMessage2 = BannerMessage(
   messageType: BannerMessageType.warning,
 );
 
+final testMessageNoDismiss = BannerMessage(
+  key: k2,
+  buildTextSpans: (_) => const [TextSpan(text: 'Test Message 2')],
+  screenId: testMessage2ScreenId,
+  messageType: BannerMessageType.warning,
+  dismissOnConnectionChanges: false,
+);
+
 final universalMessage = BannerMessage(
   key: kUniversal,
   buildTextSpans: (_) => const [TextSpan(text: 'Universal Message')],
diff --git a/packages/devtools_app/test/test_infra/scenes/cpu_profiler/default.dart b/packages/devtools_app/test/test_infra/scenes/cpu_profiler/default.dart
index 7c8bb9435a4..3bced37f561 100644
--- a/packages/devtools_app/test/test_infra/scenes/cpu_profiler/default.dart
+++ b/packages/devtools_app/test/test_infra/scenes/cpu_profiler/default.dart
@@ -41,7 +41,6 @@ class CpuProfilerDefaultScene extends Scene {
     setGlobal(IdeTheme, IdeTheme());
     setGlobal(NotificationService, NotificationService());
     setGlobal(PreferencesController, PreferencesController());
-    setGlobal(BannerMessagesController, BannerMessagesController());
 
     fakeServiceConnection = FakeServiceConnectionManager(
       service: FakeServiceManager.createFakeService(
@@ -59,6 +58,7 @@ class CpuProfilerDefaultScene extends Scene {
       fakeServiceConnection.errorBadgeManager.errorCountNotifier('profiler'),
     ).thenReturn(ValueNotifier<int>(0));
     setGlobal(ServiceConnectionManager, fakeServiceConnection);
+    setGlobal(BannerMessagesController, BannerMessagesController());
 
     final mockScriptManager = MockScriptManager();
     when(
diff --git a/packages/devtools_app/test/test_infra/scenes/memory/default.dart b/packages/devtools_app/test/test_infra/scenes/memory/default.dart
index 7562a661d33..2ce1ef5db17 100644
--- a/packages/devtools_app/test/test_infra/scenes/memory/default.dart
+++ b/packages/devtools_app/test/test_infra/scenes/memory/default.dart
@@ -106,7 +106,6 @@ class MemoryDefaultScene extends Scene {
     setGlobal(OfflineDataController, OfflineDataController());
     setGlobal(IdeTheme, IdeTheme());
     setGlobal(NotificationService, NotificationService());
-    setGlobal(BannerMessagesController, BannerMessagesController());
     setGlobal(
       PreferencesController,
       PreferencesController()..memory.showChart.value = false,
@@ -138,6 +137,7 @@ class MemoryDefaultScene extends Scene {
       fakeServiceConnection.serviceManager.vm.operatingSystem,
     ).thenReturn('ios');
     setGlobal(ServiceConnectionManager, fakeServiceConnection);
+    setGlobal(BannerMessagesController, BannerMessagesController());
     setGlobal(OfflineDataController, OfflineDataController());
 
     final showAllFilter = ClassFilter(
diff --git a/packages/devtools_extensions/CHANGELOG.md b/packages/devtools_extensions/CHANGELOG.md
index b6e27c08e50..bdb1090cd4d 100644
--- a/packages/devtools_extensions/CHANGELOG.md
+++ b/packages/devtools_extensions/CHANGELOG.md
@@ -5,6 +5,8 @@ found in the LICENSE file or at https://developers.google.com/open-source/licens
 -->
 ## 0.3.2 (not released)
 * Bump `devtools_app_shared` dependency to `0.4.0`.
+* Add `ShowBannerMessageExtensionEvent.dismissOnConnectionChanges` field. This
+value is set from an optional parameter in the constructor (defaults to `true`).
 
 ## 0.3.1
 * Bump `vm_service` dependency to `>=13.0.0 <16.0.0`.
diff --git a/packages/devtools_extensions/lib/src/api/model.dart b/packages/devtools_extensions/lib/src/api/model.dart
index 7280f83e7cb..7dd9c1fc4f1 100644
--- a/packages/devtools_extensions/lib/src/api/model.dart
+++ b/packages/devtools_extensions/lib/src/api/model.dart
@@ -92,6 +92,7 @@ class ShowBannerMessageExtensionEvent extends DevToolsExtensionEvent {
     required String message,
     required String extensionName,
     bool ignoreIfAlreadyDismissed = true,
+    bool dismissOnConnectionChanges = true,
   })  : assert(bannerMessageType == 'warning' || bannerMessageType == 'error'),
         super(
           DevToolsExtensionEventType.showBannerMessage,
@@ -101,6 +102,7 @@ class ShowBannerMessageExtensionEvent extends DevToolsExtensionEvent {
             _messageKey: message,
             _extensionNameKey: extensionName,
             _ignoreIfAlreadyDismissedKey: ignoreIfAlreadyDismissed,
+            _dismissOnConnectionChangesKey: dismissOnConnectionChanges,
           },
         );
 
@@ -113,12 +115,15 @@ class ShowBannerMessageExtensionEvent extends DevToolsExtensionEvent {
     final extensionName = eventData.checkValid<String>(_extensionNameKey);
     final ignoreIfAlreadyDismissed =
         (eventData[_ignoreIfAlreadyDismissedKey] as bool?) ?? true;
+    final dismissOnConnectionChanges =
+        (eventData[_dismissOnConnectionChangesKey] as bool?) ?? true;
     return ShowBannerMessageExtensionEvent(
       id: id,
       bannerMessageType: type,
       message: message,
       extensionName: extensionName,
       ignoreIfAlreadyDismissed: ignoreIfAlreadyDismissed,
+      dismissOnConnectionChanges: dismissOnConnectionChanges,
     );
   }
 
@@ -127,6 +132,7 @@ class ShowBannerMessageExtensionEvent extends DevToolsExtensionEvent {
   static const _bannerMessageTypeKey = 'bannerMessageType';
   static const _extensionNameKey = 'extensionName';
   static const _ignoreIfAlreadyDismissedKey = 'ignoreIfAlreadyDismissed';
+  static const _dismissOnConnectionChangesKey = 'dismissOnConnectionChanges';
 
   String get messageId => data![_idKey] as String;
   String get bannerMessageType => data![_bannerMessageTypeKey] as String;
@@ -134,6 +140,10 @@ class ShowBannerMessageExtensionEvent extends DevToolsExtensionEvent {
   String get extensionName => data![_extensionNameKey] as String;
   bool get ignoreIfAlreadyDismissed =>
       (data![_ignoreIfAlreadyDismissedKey] as bool?) ?? true;
+
+  /// Whether this message should be dismissed on app connection changes.
+  bool get dismissOnConnectionChanges =>
+      (data![_dismissOnConnectionChangesKey] as bool?) ?? true;
 }
 
 /// An extension event of type [DevToolsExtensionEventType.copyToClipboard]