Apple Music is forcing itself on iPhone docks by kicking out other apps
xda-developers.com
xda-developers.com
Some time later an update to the iPhone resolved this, so as lelandfe mentioned, this is likely a bug.
Comically after some time I grew resentful of this bug and one day my wife was in the passenger seat while I exclaimed “I hate U2”. (I don’t really mind them, but the comment came out anyways). She looked at me confused and concerned before I explained why I made the comment and consoled her that I was referring to the band and not “you too”.
Pretty clearly a bug, and this only happens when reinstalling the app (which I doubt people do very often).
I am not surprised that Tim Sweeney weighed in with a breathless take.