I took the poison dmg into consideration but I also had the "death" animation with no effect. Hit a Shambling Mound and he saved (maybe vs. poison) and was not slain although the ghost was rising.
Only mod I have installed is BGT and it messes with the item files on only few occasions (mainly for BG1 items with same code as BG2)
Well, I just have to keep hitting harder I guess
