Cannot delete cookies-SFAuthenticationSession with OKTA/Xamarin

I am using OpenId.AppAuth library to perfrom the OpenId authentication against OKTA for my Mobile application.

While setting up the Login part was really easy by showing the SFAuthenticationSession prompt and redirecting to OKTA.


I'm stuck up with the Logout though. I have tried to Delete all the cookies for my okta IDP url, however it looks like the user is stuck at login.

Is there any solution to resolve this or a workaround?