O, in that case I know what's up. It's on maps where neutral units are placed on neutral rooms, for people playing with a recent alpha version of KeeperFX Unofficial. In that alpha the units are then assigned to the neutral rooms in a way that looks cool, but unfortunately causes all kinds of silly stuff like this.
I want to release a new version of KeeperFX Unofficial soon, I made it already, but I've been putting it off because I'm not in the mood for thoroughly testing it. The new version would basically the latest alpha, with all the changes that don't work that well taken back out again. And this neutral thing is one of those.
In the meantime, you should be able to easily fix this yourself by adding the text 'PASSIVE_NEUTRALS' to 'PreserveClassicBugs' at line 38 of fxdata\rules.cfg.
EDIT: I've
released an alpha to hold people over. That should not have this bug anymore. Please let me know if this is not the case.