alert dialog pops up even when different route is called – Flutter

I have a simple flutter app with two screens. On the first screen, i have an alert dialog that pops up every time a user visits the screen.

import 'dart:async';

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


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

/// The route configuration.
final GoRouter _router = GoRouter(
  routes: <RouteBase>[
    GoRoute(
      path: '/',
      builder: (BuildContext context, GoRouterState state) {
        return const HomeScreen();
      },
      routes: <RouteBase>[
        GoRoute(
          path: 'details',
          builder: (BuildContext context, GoRouterState state) {
            return const DetailsScreen();
          },
        ),
      ],
    ),
  ],
);

/// The main app.
class MyApp extends StatelessWidget {
  /// Constructs a [MyApp]
  const MyApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      routeInformationProvider: _router.routeInformationProvider,
      routeInformationParser: _router.routeInformationParser,
      routerDelegate: _router.routerDelegate);
  }
}

/// The home screen
class HomeScreen extends StatefulWidget {
  /// Constructs a [HomeScreen]
  const HomeScreen({Key? key}) : super(key: key);

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  

  @override
  void initState() {
    Timer(const Duration(seconds : 1), (() {
      showDialog(
        context: context, 
        builder: (context) {
          return someDialogy();
          
        });
        print('i have been called forth');
    }));
  
    super.initState();
  }



  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Home Screen')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: () => context.go('/details'),
              child: const Text('Go to the Details screen'),
            ),
          ],
        ),
      ),
    );
  }
}

/// The details screen
class DetailsScreen extends StatelessWidget {
  /// Constructs a [DetailsScreen]
  const DetailsScreen({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('Details Screen')),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <ElevatedButton>[
            ElevatedButton(
              onPressed: () => context.go('/'),
              child: const Text('Go back to the Home screen'),
            ),
          ],
        ),
      ),
    );
  }
}

Widget someDialogy () {
  return AlertDialog(
    content: Center(
      child: Text('data'),
    ),

  );
}

When i try to navigate to my second screen using a hyperlink on web say http://localhost/secondscreen, the popup from my first screen shows up.
My guess is that in constructing the route stack, flutter calls the initstate in my first page which does show my popup. What is the best way to go around this while maintaining the popup that shows when my first page is called?