Imports display incorrectly after sleep mode

I’m lazy. When I’m done using my laptop for the night, I just close it up without exiting any windows. A good few times now, I’ve done this with a map open in the world editor, and then when I open up my laptop and come back to it the next day, any imported textures visible in the terrain editor or model previewer display a bunch of garbage rather than what the texture is actually supposed to look like. Here are some examples:

Not sure what could be causing this, and it’s not corrupting my map data, as closing the editor and reopening my map has everything displaying fine, but it’d be cool if this didn’t happen.