I have two Apple ID, one is a US account and another non-US account. I joined Apple Music using non-US account and saved many albums for offline use. Later, I logged into App Store using US account and it took me to Join Apple Music page. I logged out and then logged in using my non-US account, came back to Music, and blaaah.... lost all my offline saved songs... I had to re-download those again. Has anyone else come across same issue?