CTRL+Z LOS Bug?

[Zarnon]

I have also experienced this issue for doors, secret doors, pits, and terrain but that was with an image that is not part of a module. The LOS was done prior to moving to the test branch. The other thing I noticed is that some of the occluders that were closed polygons had lost one of their sides either in the transition or as part of whatever converted them to walls.

[mathgamain]

I just updated the client when I went in to see if I could make a video of the error and now I can't duplicate it, so I'm leaning towards the update correcting what what going on before.