Hello. I just got past the Dead Nations part and entered the Drowned Nations. From there I entered the tomb alone. I've gathered the 3 keys and made it to the tomb in the middle of the room but I can't open the tomb from what seems to be a bug. I read all the inscriptions and push them into the wall but I get to the one on the far left and it doesn't want to stay 'clicked'. Every time I go up to it, I can continue to push it into the wall and it says the tomb behind me clicks but nothing happens and I can't open the tomb.
Has anyone run into this problem before? Is there any way to get around it because from what I'm seeing, it just won't let me continue. I may be missing something but I looked at a guide and it said to do exactly what I was doing.

Thanks

I have also problem in the tomb. For me the teleport system of the tomb doesn't work. I was able to retrieve key 1, 2 and 4, but when I want to enter room with key 3 I am always teleported to the tomb exit portal. So I am completely stuck, because I cannot retrieve key 3.