I'm playing IWD 2 Complete with my GF in coop. Last game version, no mods.

Problem:
We met the priest Koluhm while exploring Targos and had a nice conversation with him, but that was all.
Now we are told to talk to him again about his progresses with a dead goblin. So we went back to the house where we met him before - but he's gone.

He is supposed to be in a house in the north-west of the central part of Targos. It's easy to find and to recognize - there are 3 corpses laying on the floor: 2 humans and a goblin. But Koluhm just is not there!!

We have checked every single house in Targos from harbour to the palisades; repeatedly talked to every person related to him (like his lazy 'gang' in the tavern and such), but Koluhm does not show up in 'his' house.

This seems to be a bug, and unfortunately one that is breaking the main quest :-(

I could not find anything about this problem using Google, so it does not seem to be a common bug.
We restarted the game, loaded an older save and everything - nothing. Koluhm has left the game.
He still IS there when I load a veeeery early save - but we honestly don't want to do all those quests again.

Does anybody have any idea how I could 'fix' that?????

TIA!
Belushi