[Bug] WebAuthenticator.AuthenticateAsync not closing Android browser

[jsureke]

Description

WebAuthenticator.AuthenticateAsync not closing Android browser

Steps to Reproduce

1. Build out everything for using AuthenticateAsync.
2. Login using (in my case) Okta

Expected Behavior

Login browser app should close.

Actual Behavior

It does not close. I had to set the callback activity to LaunchMode.SingleTask instead of the documented SingleTop in order to get back to the calling application. Otherwise, it stayed behind the browser.

Basic Information

• Version with issue: Xamarin.Essentials 1.5.3.2
• Last known good version: N/A
• IDE: VS 2019
• Platform Target Frameworks:
  • iOS:
  • Android: Android 10 (Q)
  • UWP:
• Android Support Library Version:
• Nuget Packages:
• Affected Devices:

Screenshots

Reproduction Link

[mattleibow]

This was fixed in the 1.6 previews that you can check out on the preview feed: https://aka.ms/xamarin-essentials-ci/index.json or try out preview 4 on NuGet.org: https://www.nuget.org/packages/Xamarin.Essentials/1.6.0-pre4