When adding a new album to my library I'm getting the "Added to library" message, however after navigating somewhere and back to the album the "Add" button is still visible, allowing me to add the album to my library again. This usually disappears after some time (library is being synchronized in the background?) but is kinda confusing from a UX perspective - I've previously had issues with adding songs to playlists so I'm defensively navigating back and forth to albums I've added to my library to make sure they are there.