I did the new jumping puzzle Gauntlet of the Khan-Ur in Grothmar Valley twice because in the first run I did not finished it in time for the achievement Khan-Ur's Right Hand. I opened the chest at my first attempt.In my second attempt I lighted the brazier next to the big chest (I also lightet the other braziers along the way) and still had time left for the achievement. But I could not interact with the chest because I had already opened it.I think I can get the achievement tomorrow (after daily reset) when I can open the chest again but today it is locked for me.