We've just upgraded our Xamarin UWP app, which we sideload and run on kiosks (Surface 3s, Windows 10) in Assigned Access mode, to Forms 126.96.36.199 from Forms 188.8.131.52. As soon as DisplayAlert is called the app crashes with:
"A COM call to an ASTA was blocked because the call chain originated in or passed through another ASTA. This call pattern is deadlock-prone and disallowed by apartment call control."
We see this exception reported in HockeyApp. This does not occur when we run the app logged in as the assigned access user, only when the app is set to start automatically.
Any news on whether this has been seen in testing and when it will be fixed.