Tried the patch, and I am afraid that it still crashes on the farm map.
The workaround, where you remove all the civilians/friendly AI from "missiontypeprops_gc.xml", did do the trick. But thats a case of removing the problem causer completely, rather then fixing whats wrong.
Also, there is still invisible civilians on all the maps.
As far as I can remember it seams to happen just as a invisible civilian is about to vault over a fence.
Can't say for sure if that's whats causing it though, it just seams likely.
Oh, and the crashes seam to be less frequent then before the 16.5 patch.
I can't really say anything for sure here ether though.