Fix https://github.com/rrousselGit/riverpod/issues/ (#4679)

## Related Issues

fixes #4669

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## Checklist

Before you create this PR confirm that it meets all requirements listed
below by checking the relevant checkboxes (`[x]`).

- [ ] I have updated the `CHANGELOG.md` of the relevant packages.
      Changelog files must be edited under the form:

  ```md
  ## Unreleased fix/major/minor

  - Description of your change. (thanks to @yourgithubid)
  ```

- [ ] If this contains new features or behavior changes,
      I have updated the documentation to match those changes.


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Bug Fixes**
* Fixed an issue where resuming a paused provider could fail to notify
listeners, ensuring buffered events are processed on resume.

* **Tests**
* Added regression tests covering provider flush/notification behavior
across navigation/resume scenarios.

* **Documentation**
* Updated changelogs to add an "Unreleased fix" entry and remove
duplicated/incorrect bullets for prior releases.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: rrousselGit

packages/flutter_riverpod/CHANGELOG.md

@@ -1,3 +1,8 @@
+## Unreleased fix
+
+- Fixed a bug where resuming a paused provider could cause it to never
+  notify its listener ever again.
+
 ## 3.2.0 - 2026-01-17
 
 - Fix the IDE pausing on "markNeedsBuild" exceptions when checking "pause on all exceptions".
@@ -723,7 +728,6 @@ Riverpod is now stable!
   ```
 
   That allows providers to implement features that is not shared with other providers.
-
   - `Provider`, `FutureProvider` and `StreamProvider`'s `ref` now have a `state` property,
     which represents the currently exposed value. Modifying it will notify the listeners:
 
@@ -1024,7 +1028,6 @@ Fixed various issues related to scoped providers.
   ```
 
   That allows providers to implement features that is not shared with other providers.
-
   - `Provider`, `FutureProvider` and `StreamProvider`'s `ref` now have a `state` property,
     which represents the currently exposed value. Modifying it will notify the listeners:
 
@@ -1498,4 +1501,3 @@ The behavior is the same. Only the syntax changed.
 Initial release
 
 <!-- cSpell:ignoreRegExp @\w+ -->
-

packages/flutter_riverpod/test/src/core/provider_subscription_test.dart

@@ -0,0 +1,51 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('flushes the provider', (tester) async {
+    // Regression test for https://github.com/rrousselGit/riverpod/issues/4669
+    final dep = NotifierProvider(() => DeferredNotifier<int>((ref, _) => 0));
+    final provider = Provider((ref) => ref.watch(dep));
+
+    await tester.pumpWidget(
+      ProviderScope(
+        child: MaterialApp(
+          routes: {'/settings': (context) => Container()},
+          home: Consumer(
+            builder: (context, ref, _) {
+              final value = ref.watch(provider);
+              return Text('$value', textDirection: TextDirection.ltr);
+            },
+          ),
+        ),
+      ),
+    );
+
+    final container = tester.container();
+    final navigator = tester.state<NavigatorState>(find.byType(Navigator));
+
+    unawaited(navigator.pushNamed('/settings'));
+    await tester.pumpAndSettle();
+
+    container.read(dep.notifier).state++;
+
+    unawaited(navigator.maybePop());
+    await tester.pumpAndSettle();
+
+    expect(find.text('1'), findsOneWidget);
+  });
+}
+
+class DeferredNotifier<StateT> extends Notifier<StateT> {
+  DeferredNotifier(this._build);
+
+  final StateT Function(Ref ref, DeferredNotifier<StateT> self) _build;
+
+  @override
+  StateT build() {
+    return _build(ref, this);
+  }
+}

packages/hooks_riverpod/CHANGELOG.md

@@ -1,3 +1,8 @@
+## Unreleased fix
+
+- Fixed a bug where resuming a paused provider could cause it to never
+  notify its listener ever again.
+
 ## 3.2.0 - 2026-01-17
 
 - Fix the IDE pausing on "markNeedsBuild" exceptions when checking "pause on all exceptions".
@@ -878,7 +883,6 @@ Riverpod is now stable!
   ```
 
   That allows providers to implement features that is not shared with other providers.
-
   - `Provider`, `FutureProvider` and `StreamProvider`'s `ref` now have a `state` property,
     which represents the currently exposed value. Modifying it will notify the listeners:
 
@@ -1211,7 +1215,6 @@ Fixed various issues related to scoped providers.
   ```
 
   That allows providers to implement features that is not shared with other providers.
-
   - `Provider`, `FutureProvider` and `StreamProvider`'s `ref` now have a `state` property,
     which represents the currently exposed value. Modifying it will notify the listeners:
 
@@ -1700,4 +1703,3 @@ The behavior is the same. Only the syntax changed.
 Initial release
 
 <!-- cSpell:ignoreRegExp @\w+ -->
-

packages/riverpod/CHANGELOG.md

@@ -1,3 +1,8 @@
+## Unreleased fix
+
+- Fixed a bug where resuming a paused provider could cause it to never
+  notify its listener ever again.
+
 ## 3.2.0 - 2026-01-17
 
 - Added missing `weak` flags to `WidgetRef.listen/listenManual`

packages/riverpod/lib/src/core/provider_subscription.dart

@@ -140,6 +140,7 @@ sealed class ProviderSubscriptionImpl<OutT> extends ProviderSubscription<OutT>
     _listenedElement.onSubscriptionResumeOrReactivate(this, () {
       final wasPaused = _isPaused;
       super.resume();
+      _listenedElement.flush();
 
       if (wasPaused && !isPaused) {
         if (_missedCalled?.data case final event?) {