Keep trying to replicate this on my i7/8GB/512 2013 MBA and I can't, BUT, I did get it once to flip out slightly when I had an external monitor connected and switched the Photoshop window between the external and built-in display. When I moved back to the built-in display, the image of the file I had open would go black.
Relaunched and tried again and it was normal. *shrug*
I'm wondering if this might also have something to do with the LG vs Samsung displays. Maybe the Samsung display causes an issue? Mine's an LG.