Colission issues

Did not happen to me but I stumbled upon this picture. Seems like there are phantom BSPs(Just like in the good ol’ Halo CE days). I don’t know if it’s caused by the default map itself or by the intersecting forge pieces. Probably the latter.

http://i.imgur.com/EVVjOjA.gif

Wow, so the Forge maps are broken to minor extents like this? Does this mean custom maps made in Forge are gonna suffer the same fate?