We chatted about this on another thread yesterday. So I'm clear, any song I saved for offline listening isn't retained anywhere in iCloud? Meaning a list of the songs I downloaded for offline listening isn't referenced and the songs download again? I will have to pick each song and select for offline listening?
I'm thinking that's the case. My offline song list doesn't exist and I'm left to download each song again following a clean install.
I went back to Spotify last night, reactivated my account, restored my saved playlists, and the songs began to download to my iPhone.
If Apple Music can't do this, I hope they can in the future.