[Bug] WebAuthenticatorResult throws task cancelled exception on Android

[nodoid]

Description

I'm using the IdentityService and RequestProvider code from https://github.com/davidbritch/xamarin-forms/tree/master/WebAuthenticatorDemo with the CallBack activity class set as in the demo repo.

The CreateAuthorizationRequest returns correctly but when fed into the WebAuthenticatorResult, the Task Cancelled exception is thrown.

The strange thing is that the webview launches with the auth website, but the exception keeps getting thrown. Authentication occurs on the website but the exception keeps being thrown.

Steps to Reproduce

1. Use the example at https://github.com/davidbritch/xamarin-forms/tree/master/WebAuthenticatorDemo
2. Change the URL for the auth service to go to

Expected Behavior

Authentication works

Actual Behavior

Task cancelled exception thrown

Basic Information

• Version with issue:1.6.1
• Last known good version:
• IDE:VS2019 pre4
• Platform Target Frameworks:
  • Android: API 29 (Q)
• Android Support Library Version: Project moved to AndroidX
• Nuget Packages:
• Affected Devices: Pixel 2 (API 29) Emulator

Screenshots

Reproduction Link

[mhedqvist]

https://github.com/xamarin/Essentials/issues/1783 similar problem using UWP. Tried removing stuff from the response?