iPod Black cover art on some albums in Coverflow under iPod Classic

[Cue]

Did a search but couldn't find anything.

Some cover art in Coverflow using it under iPod Classic shows up as plain black! Like the cover art is missing.

Same album in Coverflow under iTunes shows perfect!
Anyone experiencing the same thing? Any ideas?

 

[forafireescape]

Similar thread started by me: https://forums.macrumors.com/threads/465427/

So far no one's come up with anything, it looks like.