import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
  WidgetsFlutterBinding.ensureInitialized().ensureSemantics();
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(title: 'Semantics Issue', home: MyHomePage());
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  void _onPressed() {
    showDialog(
      context: context,
      barrierColor: Colors.grey.shade400,
      builder: (context) {
        return _dialogContent;
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Stack(
          children: <Widget>[
            Semantics(
              container: true,
              child: FilledButton(
                onPressed: _onPressed,
                child: const Text('Show Dialog'),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget get _dialogContent => Center(
    child: Container(
      margin: const EdgeInsets.all(50),
      child: const Material(
        child: SizedBox(
          height: 250,
          width: 250,
          child: Padding(
            padding: EdgeInsets.all(20),
            child: Column(
              children: [
                TextField(
                  decoration: InputDecoration(
                    border: OutlineInputBorder(),
                    labelText: 'Form field one',
                  ),
                ),
                SizedBox(height: 40),
                TextField(
                  decoration: InputDecoration(
                    border: OutlineInputBorder(),
                    labelText: 'Form field two',
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    ),
  );
}