Apple Music: Added song (imported mp3) to library but "Add to Library" options keeps re-appearing
macOS 12.5, Apple Music 1.2.5.7
- Imported a song. It's a ~200 MB continuous DJ mix mp3.
- Song appears in Songs view and can be played back.
- Right-click, Add to Library
- Activity window shows, that cloud library gets updated
- Right-click: No "Add to Library" option available, but "Delete from Library" -- as expected.
- However, after a ~30 seconds, the "Add to Library" option comes back.
For some reason, Music seems to remove the song from my library after a while. As a side effect, when I add this song to a (cloud) playlist, once Music wrongly removes the song fron the library, the entire cloud playlist is gone.
Any ideas?