Nevyansk Castle is a very interestingly designed keep. Unfortunately its a bit buggy. In a siege I noticed the westernmost tower is bugged. The staircase is a phantom. If you try to descend from the top of the tower you fall through the staircase which doesnt seem to be physical object at all and there is an invisible wall in the interior of the tower preventing you from descending to the ground. Please fix the objects so that the collision boxes function properly. Thank you.