This is still a problem with macOS 11.2. Under Mac Catalyst, the app can't connect to the systemMusicPlayer at all.

I see exactly this behavior on iOS 14. This behavior would astonish my users. Needs to be fixed ASAP. I wish I saw a way to trigger a save on a change of scene phase.

A month has gone by--no response to my FB. My app is dead in the water, and my users are abandoning the app. If I can't deliver and maintain an app, why am I in Apple's developer program?