[V18.2 Ground Combat] Some map modules have overlapping objects

[Moonfire]

Certain map modules have objects like walls and doors that seem to be duplicated in place. This is evident by glitching textures where the duplicate objects seem to be clipping through each other and also some doors and windows that are black when open. I think it's not just graphical because you sometimes have to open a door twice to get through it, like on the 3rd floor of the Abductor UFO. I'll watch for the other ones to appear again in my games.

Would it be easier for you to identify the problem maps with a save file or a screen cap?