Unsure if you're aware, but I believe the special doors around the map are not compiled correctly. I myself have the doors and their materials installed so I didn't notice the visual bug, so I asked people playing the map to give me a screenshot, and displayed below is what they saw.
Might want to look into making sure they're compiled for the next update, unless this is some kind of mistake on my part, in which case sorry for wasting your time! Though I have my doubts, as more than a few people were mentioning those doors missing textures.