Why is iTunes re-syncing all album artwork to iphone on every sync
Using iTunes 12.2, and trying to sync with my iPhone 6, which is using IOS 8.4.
I have NOT subscribed to Apple Music.
Every time I sync via USB, it gets stuck on "Waiting for Changes to be Applied" for about 5 minutes, and then starts re-syncing ALL of my album artwork onto the phone. I've synced 3 times in the last hour (once disconnecting and then reconnecting, and then once after leaving the cable connected), and each time it has re-synced all 7,000+ album covers.
Help!
iPhone 6, iOS 8.4, iTunes 12.2.0.145