I've already posted some of my findings in another thread , but it seems to me, that there is more serious bug. To recap: I've cast invisibility on myself and pushed half of goblins in camp in various pits and chasms, which caused some illogical interactions. But the most illogical one I discovered just now.

I finally pushed Ragzlin himself to the pit, but he survived. Seconds later he appeared in front of me. Ok, I pushed him once more, this time he stayed in the pit, alive, but somewhat beaten. Then I entered chamber with my other party members, not cloaked - and there goes cutscene! Ragzling saying his stuff and goblins listening to him (I even managed to make a deal with him!). To remind: his character was in the pit with few alive goblins before cutscene and they stayed there after.