Library displays wrong cover image

Hey all
I’ve just started using Panels and one of my comic covers appears in two different files, though when i open them it shows the correct file so it’s just a cover issue.
Also when using continue reading it shows the right cover…
I’ve tried re-importing though it’s been the same. Any solution?
Thanks in advance

Could just be a visual glitch, but there should be an option to rebuild thumbnails as well