iPhone iOS 12.2: music star ratings aren’t saved I’ve had this problem for a while, possibly since the start of iOS 12.

I have Show Star Ratings switches on and can access the star rating for songs in the Music app. I select Rate Song... from the action sheet, tap a star rating in the alert view, then tap the Done button. However the rating is not saved: if I open up the rating alert view again, it’s back to 0 stars.

This is happening both for music I’ve purchased from iTunes and other music I own.

Has anyone else experienced this? How can I fix it?
I noticed that when I've done this on my iPhone, and then opened the Rate Song... dialog again, right afterwards it too showed 0 stars; however when I looked at the song in iTunes on my Mac it showed the appropriate rating. When I returned to the iOS dialog it was correct as well. So I think it's working. it's just taking a bit for the interface to catch up.