Ever since I updated the Spotify app on my iPhone I've had this problem: new albums I've saved to my music after the update won't stay saved - whenever the app closes any new music I've saved is no longer in my music. This also results in music I had synced offline disappearing. I'm posting this on the iOS board since it started happening following the latest iPhone update, but it also happens when I use Spotify on my computer, where the music also doesn't stay saved, or apparently doesn't get saved at all.

This is making it kind of a hassle for me to listen to music I didn't already have saved, which fits poorly with my listening habits. What exactly is the problem here, and how can I solve it?