How to keep format's toggleStyle after focus

[honmaple]

import 'package:flutter/material.dart';
import 'package:flutter_quill/flutter_quill.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Quill Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: MyEditor(),
    );
  }
}

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

  @override
  State<MyEditor> createState() => _MyEditorState();
}

class _MyEditorState extends State<MyEditor> {
  FocusNode _focus = FocusNode();
  QuillController _controller = QuillController.basic();

  @override
  void dispose() {
    _focus.dispose();
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("Editor"),
      ),
      body: Column(
        children: [
          Expanded(
            child: QuillEditor.basic(
              focusNode: _focus,
              controller: _controller,
              configurations: const QuillEditorConfigurations(
                autoFocus: true,
              ),
            ),
          ),
          const Divider(height: 8),
          Row(
            children: [
              QuillToolbarIconButton(
                icon: const Icon(Icons.format_bold),
                iconTheme: null,
                isSelected: _isSelected(Attribute.bold),
                onPressed: () {
                  final attr = _isSelected(Attribute.bold)
                      ? Attribute.clone(Attribute.bold, null)
                      : Attribute.bold;
                  _controller
                    ..skipRequestKeyboard = true
                    ..formatSelection(attr);
                  setState(() {});
                },
              ),
              QuillToolbarIconButton(
                icon: const Icon(Icons.format_italic),
                iconTheme: null,
                isSelected: _isSelected(Attribute.italic),
                onPressed: () {
                  final attr = _isSelected(Attribute.italic)
                      ? Attribute.clone(Attribute.italic, null)
                      : Attribute.italic;
                  _controller
                    ..skipRequestKeyboard = true
                    ..formatSelection(attr);
                  setState(() {});
                },
              ),
              QuillToolbarIconButton(
                icon: Icon(
                  _focus.hasFocus ? Icons.keyboard_hide : Icons.keyboard,
                ),
                iconTheme: null,
                isSelected: false,
                onPressed: () {
                  if (_focus.hasFocus) {
                    _focus.unfocus();
                  } else {
                    _focus.requestFocus();
                  }
                  setState(() {});
                },
              )
            ],
          ),
        ],
      ),
    );
  }

  bool _isSelected(Attribute attr) {
    final attrs = _controller.getSelectionStyle().attributes;
    if (attr.key == Attribute.list.key ||
        attr.key == Attribute.header.key ||
        attr.key == Attribute.script.key ||
        attr.key == Attribute.align.key) {
      final attribute = attrs[attr.key];
      if (attribute == null) {
        return false;
      }
      return attribute.value == attr.value;
    }
    return attrs.containsKey(attr.key);
  }
}

This is demo code, I want to set some format style before edit.
Toggle on bold or toggle on italic, and then focus textfield, the toggleStyle can't work. But focus textfield first, and toggle on bold, it worked.