I have a problem where if the app (in debug mode) is either freshly opened or freshly installed. If I try to sign in with my provider, it opens the external browser (chrome for example) and it doesn't redirect me back to the application but if I go back to the application, the data reflects. Now here's another weird behavior, if I run the application again, it now opens chrome custom tabs and it handles the redirect correctly. It usually happens with the select_account prompt, otherwise in login prompt, it doesn't and the reason I chose select_account is because I am preventing the app from taking the current session that is logged into the browser.

Portion of my AuthService.dart

Future<UserModel?> signInWithMicrosoft() async {
    try {
      final microsoftProvider = MicrosoftAuthProvider();
      microsoftProvider.setCustomParameters({
        'tenant': '',
        'prompt': 'select_account'
      });

      final userCredential = await _auth.signInWithProvider(microsoftProvider);

      if (userCredential.user != null) {
       String? accessToken;
         if (userCredential.credential != null) {
         
          final oauthCredential = userCredential.credential as dynamic;
          accessToken = oauthCredential.accessToken;

        } else {
          debugPrint("Usercredential is null");
        }

        // 1. Create user immediately without the photo URL. This is fast.
        final user = await _createOrUpdateUser(
          firebaseUser: userCredential.user!,
          principalName: userCredential.additionalUserInfo?.profile?['upn'] as String?,
        );

        // 2. Fetch the photo in the background. Don't await it.
        if (accessToken != null) {
          
          _graphService.getProfilePhotoUrl(
            accessToken: accessToken,
            userId: userCredential.user!.uid,
          ).then((photoUrl) {
            if (photoUrl != null) {
              // 3. Once fetched, update the user's profile in the database.
              _updateUserPhotoUrl(uid: userCredential.user!.uid, photoUrl: photoUrl);
            }
          }).catchError((e){
             print('Failed to fetch and update profile photo in background: $e');
          });
        }
        
        return user; // Return the user immediately.
      }
      return null;
    } on FirebaseAuthException catch (e) {
      if (e.code == 'web-context-cancelled') {
        print('Microsoft sign in cancelled by user.');
        return null;
      }
      rethrow;
    } catch (e) {
      throw Exception('Microsoft sign in failed: $e');
    }
  }

Portion of my Main.dart

void main() async {
  // Ensure Flutter bindings are initialized
  WidgetsFlutterBinding.ensureInitialized();

    await SystemChrome.setPreferredOrientations([
    DeviceOrientation.portraitUp,
    DeviceOrientation.portraitDown
  ]);

  if(Platform.isAndroid){
    warmup_customtabs();
  }
  // Initialize Firebase
  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);

  
  
  // Wrap the entire app in a ProviderScope for Riverpod state management
  runApp(const ProviderScope(child: MyApp()));
}
 Future <void> warmup_customtabs() async{
   try {
    // Try the session-based warmup first (more thorough)
    await warmupCustomTabs();
    print('Custom tabs session warmup successful');
  } catch (e) {
    print('Custom tabs session warmup failed: $e');
    
  }

 }

Actually tried implementing warmup service (which is shown in the code above) for custom tabs but to no avail it still happens.