Flutter streamprovider issue with userdata from Firebase

Question

I've been stuck in this issue for sometime now and after lots of tries, now i don't know where the issue is. The problem is i'm using StreamProvider to get userData from firebase and then use that userData through provider throughout my project, Now everything works fine but the issue arises when i try to log out. Actually even logout works perfectly, untill i close the app using the backbutton of my phone and then reopen the app from open apps list, then when i try to logout it doesn't work correctly. When i refresh the app the user is logged out but initially it doesn't navigate to the login screen. here is the logout code.

InkWell(
                    onTap: () async {
                      await showDialog(
                        context: context,
                        useRootNavigator: false,
                        builder: (ctx) => AlertDialog(
                          title: const Text("Are you Sure?"),
                          content: const Text("Do You want to logout?"),
                          actions: [
                            TextButton(
                              onPressed: () {
                                Navigator.of(context).pop();
                              },
                              child: const Text(
                                "No",
                                style: TextStyle(
                                  color: ColorConstant.appColor,
                                ),
                              ),
                            ),
                            TextButton(
                              onPressed: () async {
                                Navigator.of(context).pop(true);
                                await AuthService().signOut();
                                Navigator.of(context).pushAndRemoveUntil(
                                    MaterialPageRoute(
                                        builder: ((context) =>
                                            const LoginScreen())),
                                    (route) => false);
                              },
                              child: const Text(
                                "Yes",
                                style: TextStyle(
                                  color: ColorConstant.appColor,
                                ),
                              ),
                            ),
                          ],
                        ),
                      );
                    },

And here is the main.dart i've defined StreamProvider.

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    final _auth = AuthService();
    final String? _userId = _auth.user?.uid;
    return MultiProvider(
      providers: [
        StreamProvider<List<Packages>>(
            create: (_) => DatabaseService().packages, initialData: const []),
        StreamProvider<UserModel?>(
          create: (_) => DatabaseService().userData(_userId),
          initialData: null,
        ),
      ],
      builder: (context, child) {
        return MaterialApp(
          title: 'DreamaX',
          debugShowCheckedModeBanner: false,
          theme: ThemeData(
            primaryColor: ColorConstant.appColor,
            errorColor: Colors.red,
          ),
          home: const Wrapper(),
        );
      },
    );
  }
}

Also one another thing that when i'm logging in, i navigate to MyApp so that the StreamProvider can get the userId and initialize the streamprovider. here is the login code

try {
                                          await _authService.signIn(
                                              emailCont: _emailCont.text.trim(),
                                              passCont: _passCont.text.trim());

                                          Navigator.of(context)
                                              .pushAndRemoveUntil(
                                                  MaterialPageRoute(
                                                      builder: ((context) =>
                                                          const MyApp())),
                                                  (route) => false);
                                        } on FirebaseAuthException catch (e) {

So i'm really confused now what could be the cause here?