UNEARTH isn't making minions

Could it have something to do with elevation? I just played a fortress map and noticed that on the higher elevated portions of the map, there was no interaction with pots/corpses... but on the lower elevated parts it worked (I went back and forth to make sure).

Ref # 1,304,937,911

Same in some areas. I just had a semi-boss fight that was littered with corpses and none of them were raising during or after the fight. Only with this most recent patch. Was working normal yesterday.