I'm also experiencing the same behavior in iOS 15, Xcode 13.0 beta, I have created project here on my-github. It can be my code that is the problem - but, of course, not :)

I have the same issue macOS 12.0 beta (21A5284e) Xcode Version 13.0 beta (13A5155e) on my iPhone I have the beta profile installed and it has worked fine until I installed the latest beta version, iOs 15 beta 3. I can't find any version information on the phone that relates to beta, I can only see version iOS 15.0

Tested it again and now it works well :) Xcode 13 beta 3, iOS 15 beta 3