Flutter app freezes when a TextField or TextFormField is selected

Question

I have a Flutter app that is functioning properly in all respects except when I select a TextField (or TextFormField). When I select the TextField, the cursor blinks in the TextField, but I can't type anything AND all other buttons like the floatingActionButton and the back button in the AppBar quit working. Essentially, the app appears to be frozen, but I don't get any error messages.

After numerous attempts to fix the problem in two different pages that contain FocusNodes and TextEditingControllers, I went back to square one by incorporating a new page with code straight from Flutter's website, but the TextField in this barebones code still locks up the app.

import 'package:flutter/material.dart';

class EventDetailForm extends StatefulWidget {
  static const String routeName = "/events/event-detail-form";
  @override
  _EventDetailFormState createState() => _EventDetailFormState();
}

class _EventDetailFormState extends State<EventDetailForm> {
  final myController = TextEditingController();
  @override
  void dispose() {
    myController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Event Detail')),
      body: Padding(
          padding: const EdgeInsets.all(16),
          child: TextField(
            controller: myController,
          )),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          return showDialog(
              context: context,
              builder: (context) {
                return AlertDialog(
                  content: Text(myController.text),
                );
              });
        },
        child: Icon(Icons.text_fields),
      ),
    );
  }
}

Unfortunately, I am not getting any error messages. The cursor just blinks in the TextField and everything else loses function and I have to quit and restart. I am not sure what else I should be considering. Does anyone have any ideas on what might be causing this?

Answer 1

Simulator -> Device -> Erase All Content And Settings works for me.

Answer 2

Had same problem when I upgraded Xcode to ios 13.1. I switched to a different simulator, and the problem went away.