It’s basically a result of Apple optimizing the way it seems to store music on its servers. This is why album cover art changes randomly, single tracks in an album turn to live versions, non-remastered versions are replaced with the remastered tracks, compilations get split into single tracks from various other sources instead of remaining one album, whole albums and even bands vanish from playlists. The list is endless. Even yesterday I rebuilt my “retro” playlist and as soon as the tracks from AM landed in the playlist, they started changing which album they’re from.
I love AM a lot, prefer it to Spotify, love the sound, mastering, Spatial Audio, integration with AirPods and Sonos, even though the way playlists and UpNext on iOS are handled is nightmarish — but the way they mess up artwork and sources is really annoying if you care the slightest about curated content.
