Flutter Bloc 7.0.0 state not updating after migrate to null safety

i've been trying to update state from bloc for hours and didnt work, i even try to check the properties of the state before yield and all properties is updated but the state wont.

here is my code

Bloc

  @override
  Stream<HomeState> mapEventToState(
    HomeEvent event,
  ) async* {
    if (event is HomeStarted) {
      yield HomeLoadSuccess(carts: []);
    }
    if (event is HomeCartAdded) {
      var currentState = state as HomeLoadSuccess;
      var carts = addCart(currentState.carts, event.item, event.qty);
      print(carts);
      //output carts working as expected but the state doesnt change/update
      //yield HomeInitial(); uncomment this line works but meh
      yield currentState.copyWith(carts: carts);
    }
  }

Event

abstract class HomeEvent {}

class HomeStarted extends HomeEvent {}

class HomeCartAdded extends HomeEvent {
  final Item item;
  final double qty;
  HomeCartAdded({required this.item, this.qty = 0.0});
}

State

abstract class HomeState extends Equatable {
  @override
  List<Object> get props => [];
}

class HomeInitial extends HomeState {}

class HomeLoadInProgress extends HomeState {}

class HomeLoadSuccess extends HomeState {
  final List<Cart> carts;

  HomeLoadSuccess({
    required this.carts,
  });

  HomeLoadSuccess copyWith({List<Cart>? carts}) {
    return HomeLoadSuccess(
      carts: carts ?? this.carts,
    );
  }

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

Item Class

class Item extends Equatable {
  int id;
  String name;
  String picture;
  double price;
  Item({
    required this.id,
    required this.name,
    required this.picture,
    required this.price,
  });

  @override
  List<Object> get props => [id, name, picture, price];
}

Cart Class

//class item
class Cart extends Equatable {
  Item item;
  double qty;
  double total;
  Cart({
    required this.item,
    required this.qty,
    required this.total,
  });
  @override
  List<Object> get props => [item, qty, total];
}

is there anything wrong with my code or am i missing something here ? im able to get this code working with prev version of bloc.. thanks