Given that no software/service release is guaranteed to run smoothly, such was the case when Apple Music went live. For the most part, it seemed that Apple Music worked, but there were some users who were subscribed to both iTunes Match and Apple Music who ran into some issues with their songs.
Namely some iTunes Match users were claiming that Apple Music caused the deletion of their entire music libraries, and where some songs on iTunes Match were swapped for Apple Music, which shouldn’t be the case due to the existence (or lackthereof) of DRM on some songs uploaded onto iTunes Match/iCloud Music Library.
Thankfully Apple has since issued an update to iTunes, bringing it up to version 12.2.1 which according to the changelogs, will address some of the issues that users are having with iTunes Match and Apple Music, where some former iTunes Match subscribers weren’t able to sign up for Apple Music.
The update will also address some minor bugs and improvements for the Beats 1 radio station which is Apple’s take on online radio. So if you are having any issue with Apple Music, iTunes Match, or Beats 1, then perhaps this is an update you’ll want to get your hands on ASAP.