Album Art View Blank Albums

[Satuim]

Hello When I'm in album art view (which is all the time) There are always a couple of blank albums right up the top (screenshot attached) They are named after folders that I have on my Music Library.

The only connection I can make is that they have .wav or a module file in them.
Also when I click the picture icon (to turnoff album art view) these blank albums will go away.

Any light?