why posting data to firebase using flutter bloc is not emitting?

I’m creating an app with firebase as a database. After sending data to firebase, app screen should pop out for that I had bloclistener on the screen but after sending the data to firestore database, nothing is happening, flow is stopped after coming to loaded state in bloc file why? check my code so that you will know. I can see my data in firebase but it is not popping out because flow is not coming to listener.

  state:
    class SampletestInitial extends SampletestState {
  @override
  List<Object> get props => [];
}

class SampletestLoaded extends SampletestState {
  SampletestLoaded();

  @override
  List<Object> get props => [];
}

class SampletestError extends SampletestState {
  final error;

  SampletestError({required this.error});

  @override
  List<Object> get props => [error];
}

    
    bloc:
   class SampletestBloc extends Bloc<SampletestEvent, SampletestState> {
  SampletestBloc() : super(SampletestInitial()) {
    on<SampletestPostData>((event, emit) async {
      emit(SampletestInitial());
      try {
        await Repo().sampleTesting(event.des);
        emit(SampletestLoaded());
      } catch (e) {
        emit(SampletestError(error: e.toString()));
        print(e);
      }
    });
  }
}
    
    Repo: ---- Firebase post data
    Future<void> sampleTesting(String des) async {
    final docTicket = FirebaseFirestore.instance.collection('sample').doc();
    final json = {'Same': des};
    await docTicket.set(json);
  }
    
    TicketScreen:
 //After clicking the button ---
    BlocProvider<SampletestBloc>.value(
      value: BlocProvider.of<SampletestBloc>(context, listen: false)
        ..add(SampletestPostData(description.text)),
      child: BlocListener<SampletestBloc, SampletestState>(
        listener: (context, state) {
          if (state is SampletestLoaded) {
            Navigator.pop(context);
            print("Popped out");
          }
        },
      ),
  );