Sample packs

I’ve installed sample packs and they worked as expected and then the artwork in the right zone in Cubase vanished. The samples can still be found there after clicking on the loops & samples icon and show all results, but no art work. These serve as quick visual reference. I hoped with each upgrade the problem would be solved but I haven’t been able to figure this out. By the way in Groove Agent SE 5 the art work shows up in its browser. Can anyone help with this problem?