Flutter TextField清除表单并设置焦点后无法输入问题求助

我已将代码修改为最小可复现示例，您可以直接复制到Flutter项目中运行。

我怀疑这可能是Flutter的bug，但在提交bug报告前，先在此咨询。我做了如下表单：表单打开时单选按钮默认选中Check Out；当用户切换到另一个单选按钮时，表单字段应被清除，且焦点应设置到location输入框并允许立即输入。

打开表单后选择Check In选项时，焦点会切换到location输入框，我可以正常输入内容。但如果我随后切换到Check Out选项，焦点看似仍在location输入框上，却无法输入内容；再次切换回Check In选项时，同样无法输入。可能是我的实现有误，但似乎在未输入内容前连续多次请求焦点存在异常。

表单初始状态：

选择Check In选项（焦点切换到location输入框，可立即输入）：

选择Check Out选项（location字段清空，光标仍存在，但无法输入）：

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

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

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

enum CheckInOutType { checkIn, checkOut }

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  CheckInOutType? selectedCheckInOut = CheckInOutType.checkOut;
  final locController = TextEditingController();
  late FocusNode locFocusNode; // = FocusNode();

  @override
  void initState() {
    super.initState(); //Run this first
    initialize();
  }

  @override
  dispose() {
    super.dispose(); //Run this last
    locFocusNode.dispose();
  }

  void initialize() async {
    locFocusNode = FocusNode();
  }

  void clearFields() {
    locController.text = '';
    locFocusNode.requestFocus();
    setState(() {

    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('Overflow Inventory'),
          centerTitle: true,
          leading: IconButton(
            icon: const Icon(Icons.arrow_back),
            onPressed: () {
              Navigator.pop(context);
            },
          ),
        ),
        body: Column(
          children: [
            Row(
              children: [
                Expanded(
                  flex: 1,
                  child: ListTile(
                    title: const Text('Check In'),
                    leading: Radio<CheckInOutType>(
                      value: CheckInOutType.checkIn,
                      groupValue: selectedCheckInOut,
                      onChanged: (CheckInOutType? value) {
                        setState(() {
                          selectedCheckInOut = value;
                        });
                        clearFields();
                      },
                    ),
                  ),
                ),
                Expanded(
                  flex: 1,
                  child: ListTile(
                    title: const Text('Check Out'),
                    leading: Radio<CheckInOutType>(
                      value: CheckInOutType.checkOut,
                      groupValue: selectedCheckInOut,
                      onChanged: (CheckInOutType? value) {
                        setState(() {
                          selectedCheckInOut = value;
                        });
                        clearFields();
                      },
                    ),
                  ),
                ),
              ],
            ),
            Row(
              children: [
                Expanded(
                    child: Text('${selectedCheckInOut == CheckInOutType.checkOut ? 'From' : 'To'} Location:', style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w700))
                ),
                Expanded(
                    child: TextField(
                      focusNode: locFocusNode,
                      controller: locController,
                    )
                ),
              ],
            ),
          ],
        ),
      );
  }
}

内容的提问来源于stack exchange，提问作者TheMortiestMorty