iPhone XR - I have about 40 Playlists on my iMac that were burned from physical CD's in to the Music App (was called iTunes) I then sync the iPhone to the Playlists in Music. All is good. 2 or 3 days later my iPhone only has about 10-15 of the 40 Playlists. I then re-sync. Good. A couple of days later about half of the Playlists are gone. This happens repeatedly. Anyone else having this issue and know a fix?