When I'm searching I often get a corrupt piece of artwork and some garbled text at the top left of the main display like this:
The only way I can sort of replicate is the following:
1) Make sure you're in 'List (by album)' view with artwork showing as a column header
2) Have the Column Filter displayed
3) Start typing in the search box (pick a random word that you know is included in something, e.g. 'green')
4) Delete one letter (e.g. so it now says 'gree')
5) Add that letter back in ('green')
6) Keep doing this and after a couple of times it usually gives me results like the screenshots
If I then click the 'minimize left panel' icon and then 'show left panel' the corrupt artwork disappears and it fixes it.
I'm not sure what else is specific to it but I get it quite a lot when searching.