Music album artwork (covers) Not showing up frodo

My album artwork (covers) are not showing up for some of my albums.
The ones that are not shown are those which do not have a folder.jpg.
I scan items to library but still, they do not show up.
How am I supposed to fix that?
When I scanned items to library in Eden, album covers were retrieved.
Folder structure:
artist/ fanart.jpg folder.jpg (not in all of them)
artist/album/fanart.jpg folder.jpg (not in all of them)
If I am not mistaken, normally the folder.jpg is retrieved from the same album cover, if it's not something weird.
Skin transparency, but it does the same to confluence, and aeon-nox as well.
Any help would be greatly appreciated.

Perhaps, nobody has experienced this issue!