I have an older iPod Touch running iOS 4.5 and use the Manager to listen to music through my bedside radio going to sleep as well as listening to Spanish dialog courses in the car when I'm alone.
Some time ago Apple on an iOS update removed the ability to access the Manager and after I emailed Tim Cook replaced it within 2-4 weeks. Without the Manager, I'd never be able to use this device. I now depend on it and CopyTrans so much. Thanks.
Hello! Please try to change the album cover manually following this guide: https://www.copytrans.net/support/how-do-i-add-artwork-to-iphone-and-ipad/
Have the EXACT same problem on my iphone 12 pro max. The album cover is correct before syncing to phone, but after syncing the cover is wrong, using another cover from a different album/band which had already been synced