Any update on this? I had a dialog (dialogs.alert) with 2 buttons that was working, now it is behaving like this... the buttons are now non-responsive. I have to kill the app. The dialog was wrapped in a function. I decorated the function with @ui.in_background and that caused the dialog to not appear at all.
It was working on my Iphone 8 and my Ipad pro... now it is not working on either.
Dialogs.alert with only "OK" and hide_cancel_button=True seem to work fine.