Comment by ianferrel

I remembered a third one:

3. It won't reliably play music anymore! I have a good set of songs in my iPhone's Apple Music library. When I say "Hey siri, play <song/artists>", it asks me for access to Pandora (which I do have on my phone). I don't want to play it on Pandora. I have the song! I have just spent the last 10 minutes trying to figure out how to change this, and neither the youtube video I found searching nor this reddit thread (https://www.reddit.com/r/ios/comments/y18ioq/changing_the_de...) seems to work.

Amusingly (?) the reddit people have the opposite problem. They want to use a 3rd party music app but can't get their phones to stop preferring Apple-provided apps.

I can sometimes get this to work by saying "Play <song/artist> on Apple Music", but even that is not reliable.