I must say i haven't tried v022 yet but in 021 90% of the NPC once they are dead fall through the floor and i can't loot them. same goes for their weapons. can anybody help me, give me a clue... is it a bug that wasn't fixed or did I do something wrong when installing some files?
P.S. I have noticed that in v021 there were no netch creatures. Were they added in v022.

Confirmed here
Yes, this happens to me too, with vanilla v022 installed. It seems to happen in caves mainly, but it doesn't happen all the time. I saw it happen with the first NPC in Addamasartus and a few other NPCs and objects in that same cave.
It doesn't break the game, but it is annoying when it happens. Some kind of problem with collision meshes I would imagine.