"Unable to process request due to missing initial state" when using startActivityForSignInWithProvider with Apple sign in

[datvm]

[REQUIRED] Step 2: Describe your environment

• Android Studio version: N/A. Visual Studio 2022 Version 17.10.5
• Firebase Component: Authentication
• Component version: 22.3.1.2

[REQUIRED] Step 3: Describe the problem

Steps to reproduce:

Following Authenticate Using Apple on Android, I have this code (C# but it should be equivalent to Java):

var activity = await Platform.WaitForActivityAsync();
var provider = OAuthProvider.NewBuilder("apple.com").Build();

try
{
    var authResult = await auth.StartActivityForSignInWithProvider(activity, provider).AsAsync<IAuthResult>();
    FbUser = authResult.User;

    return authResult.Credential;
}
catch (FirebaseAuthWebException ex)
{
    if (ex.ErrorCode == "ERROR_WEB_CONTEXT_CANCELED")
    {
        return null;
    }

    throw;
}

After calling StartActivityForSignInWithProvider, an in-app browser is opened but after signing in successfully, this page opens instead:

Closing this page by pressing X on the top left corner also closes my app and the next time the app starts, it is stuck at the splash screen and has to be restarted.

Relevant Code:

See above.

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[lehcar09]

Hi @datvm, thank you for reaching out. I tried to reproduce the issue using the Firebase quickstart app, however, I did not encounter the error.

Can you share the browser you’re using when you encounter the issue? Also, were you able to check the possible scenarios shared that might have caused the issue?

Aside from that, I just wanted to share this Stack Overflow post that encounters the same issue. Could you try the suggested steps in registering my app with SafetyNet with SHA2? According to the post, the issue might be due to missing SafetyNet. The app tries to redirect you to a browser for Recaptcha for verification if you don't have SafetyNet. Thus, having no SafetyNet will cause your app to always be redirected to Recaptcha which sometimes causes an error. To resolve this issue, register your app with Safety Net. You can check this documentation, Enabling App Verification, for more information.

[rsegecin]

Hi @lehcar09 I've encountered this issue when I'm trying to login on X using firefox see firebase/flutterfire/issues/13141.

[datvm]

@lehcar09 Hi, I do not use SafetyNet so I don't think it's relevant (and I heard it's obsolete soon from the SO post you linked). The browser being opened is Microsoft Edge for Android. It happens about 2/3 of the time I tried. Sometimes the log in is successful but it's in the minority.

[lehcar09]

Thank you for the details @datvm. I was able to reproduce the issue when using the Microsoft Edge browser. I'll inform our engineers about and see what we can do here. Thanks!

[lehcar09]

Hi @datvm, our engineers are already looking into it. By any chance, can you help us and share a console log from Microsoft Edge for Android upon encountering the issue? Thanks!