I’m wondering if there is a size limit (either resolution or file size) for album covers in the iOS Music app? And does it vary from device to device? I ask because I have been downloading hi-res artwork from the iTunes Store (from here https://bendodson.com/projects/itunes-artwork-finder/ if you’re interested) and manually adding them to my library on my Mac. I then sync to my iOS devices. The really big ones seem to be having problems syncing, they say the are syncing but don’t copy across at all. Syncing again and it tries to copy them again. There are no error messages.