099 J9.
Please take a look at the save, there is the same bug/feature when enemies don't move (and even turn) from turn to turn. Only react to the fire or autofire when on the line of the sight.
Map: new Loknaar village (mesh fences), Pogrom mission.
Straight after killing all the neutrals pogromists got frozen to their places.
The same question - lack of the scripts or bug?
If it helps: Basic X-COM is v. 1.4, straight from gog.com