ScaffoldMessenger snackbar is used three timnes and enters a loop - flutter

Question

I'm using the riverpod state management dependency. And while I was testing the login error message a strange behavior occured. If I try two or more consecutive (another snackbar is already being shown) times to login the SnackBar enters a loop, and it keeps on showing and disappering the same snackbar message. I logged the .showSnackBar function and it's working just fine, no loop prints found... This happens either successuful or error states.
Widget:
ref.listen<AsyncValue>(loginControllerProvider, (_, state) {
state.when(
data: (data) {
counter++;
print(counter); //Trying to see the loop right here, it printed correctly
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(content: Text("Login realizado com sucesso!")),
);
},
error: (error, stackTrace) {
if (error is LoginException) {
counter++;
print(counter); //Trying to see the loop right here, it printed correctly
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(content: Text(error.message)),
);
}
},
loading: () {},
);
});
WIdgetController:
class LoginController extends StateNotifier<AsyncValue<void>> {
LoginController({required this.loginService})
: super(const AsyncData<void>(
null)); //Inicialação do AsyncValue, isso é obrigatorio pois ele é
final LoginService loginService;
Future<void> logar(String email, String password) async {
state = const AsyncLoading<void>();
await Future.delayed(const Duration(seconds: 2));
state = await AsyncValue.guard<void>(
() => loginService.login(email, password),
);
}
}
I managed a way out of this by executing:
ScaffoldMessenger.of(context).clearSnackBars();
But do I really have to do this everytime?