why @action is not batching notifications? Is my implementation of @action correct?

[danteCarvalho]

 @observable
  int a = 0;

  @action
  init() async {
    await Future.delayed(Duration.zero);
    a = await Future.delayed(Duration(seconds: 1), () {
      return 1;
    });
    await Future.delayed(Duration.zero);
    a = await Future.delayed(Duration(seconds: 1), () {
      return 2;
    });
    await Future.delayed(Duration.zero);
    a = await Future.delayed(Duration(seconds: 1), () {
      return 3;
    });
    await Future.delayed(Duration.zero);
  }

if the code has a 'await' the Observer is called even if the @action method is not finished, in this case the Observer is called 3 times after the "await Future.delayed(Duration.zero);"

[fzyzcjy]

Please show your full code including .g.dart since I am suspecting the code is not generated

[danteCarvalho]

testef.zip
this is my test project