issue_169809

main.dart

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

void main() => runApp(const MyApp());

final _router = GoRouter(
  routes: [
    GoRoute(
      path: '/',
      builder: (context, state) => const HomePage(),
      routes: [
        GoRoute(path: 'Page', builder: (context, state) => const Page1()),
        GoRoute(path: 'page', builder: (context, state) => const Page2()),
      ],
    ),
  ],
);

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

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

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

  @override
  Widget build(context) => Scaffold(
    appBar: AppBar(title: const Text('Home')),
    body: Center(
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          ElevatedButton(
            onPressed: () => context.go('/Page'),
            child: const Text('Upper Case'),
          ),
          const SizedBox(height: 40),
          ElevatedButton(
            onPressed: () => context.go('/page'),
            child: const Text('Lower Case'),
          ),
        ],
      ),
    ),
  );
}

class Page1 extends StatelessWidget {
  const Page1({super.key});

  @override
  Widget build(context) => Scaffold(
    appBar: AppBar(title: const Text('Page')),
    body: const Center(
      child: FlutterLogo(
        size: 200,
        style: FlutterLogoStyle.stacked,
        textColor: Colors.red,
      ),
    ),
  );
}

class Page2 extends StatelessWidget {
  const Page2({super.key});

  @override
  Widget build(context) => Scaffold(
    appBar: AppBar(title: const Text('page')),
    body: const Center(
      child: FlutterLogo(
        size: 200,
        style: FlutterLogoStyle.stacked,
        textColor: Colors.green,
      ),
    ),
  );
}