Hi, When debugging an iOS AUv3 extension in GarageBand (or in other host apps) on Mac OS Monterey running on an M1 Mac, there is a large number of warnings that read:
WARNING: SPI usage of '-[UINSWindow uiWindows]' is being shimmed. This will break in the future. Please file a radar requesting API for what you are trying to do.
I noticed that immediately after such a warning, the view's hitTest is called with a UIHoverEvent, and indeed moving the mouse results in more log spam. Although the very first occurrence of the warning may have a different root cause. Using a symbolic breakpoint wasn't helpful in revealing further information.
Note that I'm launching the AUv3 extension in the "Designed for iPad" mode. Project language is Objective-C. I was able to reproduce the issue with even an empty project, adding nothing beyond Xcode's built-in appex template for iOS Audio Units.
The issue doesn't seem to happen with the Apple sample code "CreatingCustomAudioEffects", which is a swift project. I also compared and matched storyboard settings between that project and my own, but to no avail.
Any pointers would be highly appreciated. Thanks.
