I am not even using Apple Music and right now I have an Apple Music ”widget” stuck on my lock screen. Maybe some app using audio triggereg it, I have no idea.
...launching and force quitting Apple Music removed the widget.
On my iPhone, the audio control widget sometimes loses track what I am listening to, even mixing the apps. It might show that I am listening to a podcast using Overcast, but I am actually listening to music using Spotify..