Offline playlists no long work – Microsoft Groove Review

My biggest complaint is that offline playlists no longer work. The only exception is songs stored on One Drive, they play offline. I have contacted MS support several times and no one has any knowledge of Groove Music. Very frustrating considering we pay a monthly fee. Minor issues are that album art seems to change or disappear at random. Some songs that can be played offline on Windows can't be downloaded to iOS. The app looks nicer and has more features now. But I would gladly take the old app for offline play. Groove is useless to me on my iPhone until this is fixed.
Review by Hallucinogen52 on Microsoft Groove.