[go_router] Parent page is rebuild when navigate in nested child page about flutter HOT 6 CLOSED

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

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

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

  final GoRouter _router = GoRouter(
    routes: <RouteBase>[
      GoRoute(
        path: '/',
        builder: (context, state) {
          return const RootPage();
        },
        routes: [
          GoRoute(
            path: 'a',
            builder: (context, state) {
              return const DetailPage();
            },
          ),
        ],
      ),
    ],
  );

  @override
  Widget build(BuildContext context) => MaterialApp.router(routerConfig: _router);
}

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

  @override
  State<RootPage> createState() => _RootPageState();
}

class _RootPageState extends State<RootPage> {
  @override
  Widget build(BuildContext context) {
    print('RootPage build');
    return Scaffold(
      appBar: AppBar(title: const Text('/')),
      body: Center(
        child: Column(
          children: [
            ElevatedButton(
              onPressed: () => GoRouter.of(context).go('/a'),
              child: const Text('go to a'),
            ),
          ],
        ),
      ),
    );
  }
}

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

  @override
  State<DetailPage> createState() => _DetailPageState();
}

class _DetailPageState extends State<DetailPage> {
  @override
  Widget build(BuildContext context) {
    print('DetailPage build');
    return Scaffold(
      appBar: AppBar(title: const Text('a')),
      body: Center(
        child: Column(
          children: [
            ElevatedButton(
              onPressed: () => GoRouter.of(context).pop(),
              child: const Text('pop'),
            ),
          ],
        ),
      ),
    );
  }
}