fix(llc): delay StreamVideo instance disposing (#1112)

* delay streamvideo instance disposing

* changelog

Author: Brazol

packages/stream_video/CHANGELOG.md

@@ -1,3 +1,8 @@
+## Unreleased
+
+🐞 Fixed
+- Resolved an issue that could cause the StreamVideo instance to be disposed prematurely before ringing events were fully processed when handling ringing notifications in the terminated state.
+
 ## 0.11.2
 
 🐞 Fixed

packages/stream_video/lib/src/stream_video.dart

@@ -709,6 +709,10 @@ class StreamVideo extends Disposable {
     return manager.on<T>(onEvent);
   }
 
+  /// This method is used to dispose the StreamVideo instance after the ringing event is resolved.
+  /// It is used primarily for Firebase Messaging background handler where separate isolate is used to handle the message.
+  ///
+  /// [disposingCallback] is a callback that allows to perform any additional disposing operations after the ringing event is resolved.
   StreamSubscription<RingingEvent>? disposeAfterResolvingRinging({
     void Function()? disposingCallback,
   }) {
@@ -718,8 +722,11 @@ class StreamVideo extends Disposable {
             event is ActionCallDecline ||
             event is ActionCallTimeout ||
             event is ActionCallEnded) {
-          disposingCallback?.call();
-          dispose();
+          // Delay the callback to ensure the call is fully resolved.
+          Future<void>.delayed(const Duration(seconds: 1), () {
+            disposingCallback?.call();
+            dispose();
+          });
         }
       },
     );