Cannot use "ref" after the widget was disposed

[SdxCoder]

Describe the bug In our production app from firebase crashlytics, we are getting this exception being logged .i.e Bad state: Cannot use "ref" after the widget was disposed.

Crash Log

  Non-fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: Bad state: Cannot use "ref" after the widget was disposed.
       at ConsumerStatefulElement._assertNotDisposed(consumer.dart:550)
       at ConsumerStatefulElement.read(consumer.dart:619)
       at StoresMapComponent.build.<fn>(stores_map_component.dart:35)
       at _GoogleMapState.onPlatformViewCreated(google_map.dart:441)

To Reproduce We are setting google map controller on onMapCreated callback

 GoogleMap(
            onMapCreated: (controller) {
              ref
                  .read(
                    getMapControllerProvider(MapToLoad.stores).notifier,
                  )
                  .update(IMapController.googleaMaps(controller));
            },
            zoomControlsEnabled: false,
            myLocationButtonEnabled: false,
            buildingsEnabled: false,
            myLocationEnabled: true,
            markers: markers.values.map((e) => e.toGoogleMapMarker()).toSet(),
            initialCameraPosition: cameraPosition.toGoogleMapCameraPosition(),
          )
          

// Map Controller Provider 
final getMapControllerProvider = NotifierProvider.autoDispose
    .family<GetMapControllerNotifier, IMapController?, MapToLoad>(
  () {
    return GetMapControllerNotifier();
  },
);

class GetMapControllerNotifier
    extends AutoDisposeFamilyNotifier<IMapController?, MapToLoad> {
  @override
  IMapController? build(MapToLoad args) {
    return null;
  }

  void update(IMapController controller) {
    state = controller;
  }
}

And its being used in another provider

final mapControllerProvider = NotifierProvider.autoDispose
    .family<MapControllerNotifier, IMapController?, StoresTypeToFetch>(
  () {
    return MapControllerNotifier();
  },
);

class MapControllerNotifier
    extends AutoDisposeFamilyNotifier<IMapController?, StoresTypeToFetch> {
  @override
  IMapController? build(StoresTypeToFetch args) {
    state = ref.watch(getMapControllerProvider(MapToLoad.stores));

    ref.listen(
      selectedLocationCameraPositionProvider(args),
      fireImmediately: true,
      (previous, next) {
        if (previous != next) {
          state?.animateCamera(next);
        }
      },
    );

    return state;
  }
}

Is there any thing wrong with this approach which is causing this error? Can i get help on this ?

Expected behavior This bug shouldn't appear.