My apologies if I've missed this, I've sent the last 20 minutes looking for the issue here while trying to fix it myself on my device.

I have updated a cover on a book in my Calibre library, one that is sideloaded as a kepub on my Aura H2O2. When I click on the book in my "device" library listing, it shows the updated cover, but when I eject the device, it still shows the old one. I've tried removing the cover, matching the book to the library, and countless "update metadata on device, the old cover persists. What am I doing wrong?