How to get data on initState - Flutter Web Behavior

Question

I'm getting a variable (number 4999 as example) from Firebase into the initState as follows:

class AsyncInitTestPage extends StatefulWidget {
  const AsyncInitTestPage({Key? key}) : super(key: key);


  @override
  _AsyncInitTestPageState createState() => _AsyncInitTestPageState();
}


class _AsyncInitTestPageState extends State<AsyncInitTestPage> {

  LoteActualBloc estanqueBloc = LoteActualBloc();

  String numtext = 'Previous';

@override
  void dispose() {
    estanqueBloc.dispose();
    super.dispose();
  }

@override
void initState() {
    _getNumberOnce();
  super.initState();  
}


Future<void> _getNumberOnce() async {
  int _num = await estanqueBloc.getNumber();
  numtext = _num.toString();
  print('Number on InitState $numtext');
  setState(() {});
}

  @override
  Widget build(BuildContext context) {

    print('Number on Build $numtext');

    return Scaffold(
      appBar: AppBar(
        title: Text('Async InitState Test'),
      ),
    );
  }
}

The Firebase RTDB query is pretty simple:

 Future<int> getNumber() async {

  Query resp = db.child('PATH/number');
    return resp.once().then((snapshot) => (snapshot.snapshot.value as dynamic));
} 

On mobile, I am getting the data as expected...

flutter: Number on Build Previous

flutter: Number on InitState 4999

flutter: Number on Build 4999

When I execute the same code on Web, I'm not getting the data...

Number on Build Previous

Are there differences in async functions in Web and Mobile?

How can I fix the code so that it works correctly in both environments (Web & Mobile)?

APPEND:

I am using firebase_database version: ^9.0.8 and Flutter 2.10.3. Before updating Flutter and using version 8.2.0 the code worked correctly in both environments.

If I downgrade to firebase_database^8.2.0, and make the corresponding changes (snapshot.value instead snapshot.snapshot.value) the queries work fine on Web again