No. I killed him and got to the gate where I met Jassad. But I haven't killed the twin assassins that Malguk sent after me. When I got back in trying to get to the lever and the hut. I actually saw the hut but couldn't reach it. I tried to trace back to the arena but couldn't either.
Something weird happened to Lasta ( the sword ), I didn't have to use the square to draw it.
Anyway, I used an earlier save and easily completed the period. So it is probably a bug. As you said you have played over 100 times, maybe you should try this one out : trying not to get into the cave with an elevator ( where you will meet the twin assassins ) but get into the cave with the fall trap to see what happen ?