Bugged/stuck enemy preventing weave from ending

On weave 13 in the second part, one of the final enemies was stuck in a wall, so the weave wouldn’t finish.
Luckily we found him and I could kill him with the AOE of the hagbane, but on other occasions, this might completely stop you from finishing a weave. See the attached screenshot.

#plsfix

I’ve had ungor archers get stuck in the same final area, but rather in the far left (in this picture), also surrounded by walls on most sides.