[Source] Strange editor mesh mess bug

[Bot]

Anyone seen this stuff happen before? It's not happening all the time, so it's not stopping me from working on the map, but oh boy is it annoying. Perhaps someone here knows how to fix it? 
(Also, sorry if this is in the wrong section  ).

[FMPONE]

Try updating your graphics drivers?

[Bot]

Tried, but didn't work. Thanks though.

Turns out it's related to displacement maps. Disabling them when they're not necessary turned out to be a decent workaround, so at least there's that.