Hi @QuentinGprd,

Unfortunately I wasn't able to recreate this issue.

I tested using the auth/test_app as a baseline.  In ReauthenticateAysnc I hard-coded an update to the user profile by updating the display name once the re-authentication completed.

Line 442, immediately after the LogTaskCompletion if {} block, add:

return UpdateUserProfileAsync(newDisplayName: "<something>");

This is successfully updates the profile (immediately after re-authenticating via email) without an error in my testing.

As an additional test, in UpdateUserProfileAsync I chain a task which updates the email address of the account. I then output both auth.CurrentUser and the DefaultInstance.CurrentUser when it completes.  In my tests they were both successfully updated:

Line 303, add:

auth.CurrentUser.UpdateEmailAsync("<some_test_email>")
   .ContinueWithOnMainThread(update_email_task => { 
        EnableUI();
        if (LogTaskCompletion(update_email_task, "User Email")) {
            DisplayDetailedUserInfo(auth.CurrentUser, 1);
            DisplayDetailedUserInfo(Firebase.Auth.FirebaseAuth.DefaultInstance.CurrentUser, 2);
       }
});

Could you update this code to make it fail in the way that you're seeing errors in your app? Thanks!

I just added the following button in the auth/test_app UIHandler:

if (GUILayout.Button("Update DisplayName")) {
            UpdateUserProfileAsync("Kiki");
}

Here is a video of the bug

As you can see, after re-entering Play Mode, the previous name is still displayed. I need to logout then sign in to get the new one.

Let me know if you need anything else.

Hi this was fixed in 6.4.0 https://firebase.google.com/support/release-notes/unity#version_640_-_august_26_2019