Unusable corpses

Certain time i have issues targeting corpses. While i can use 'A' to highlight the corpse i cannot use it with detonate dead/volatile dead.





i could not cast detonate dead while mousing over the middle of the corpse pile and my character would just stand there and die. this was in the boss area of the lookout map but i have noticed this in a few other areas.

i cannot tell if this has to do with map objects or something else since i cannot reliably reproduce this bug but it does not go away even after exiting and re-entering the area.