Music.app pops-up in front of my App when playing Apple Music

I'm writing a Mac Catalyst app that displays graphics in a window while trying to play Apple Music content in the background.

However, if the Music.app is not already running, as soon as my app goes to stream a song (which does successfully play) the Music.app's window pops-up on screen, obscuring my app's window!

Is there something simple I can do to force Music.app to stay iconified?

I'm trying to avoid hacking this. (...like having to use "scripting bridge," if that's even still possible, or forcing a hotkey to close the window, or something similarly kludgey.)
Thanks for any ideas!
Music.app pops-up in front of my App when playing Apple Music
 
 
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