While working on “Intrepid Explorer”, I ended up at the jumping puzzle in Iron Marches. Even though you don’t have to complete it to get the achievement, I decided I want to. After being knocked off countless times by enemies and conditions, I finally figured out how to get through all of the pillars. When I reached the end, the chest was already opened and there was no option to open it. This was my first time completing the jumping puzzle as I received the achievement from the “Jumping Puzzles” section, so I don’t know why I didn’t get anything. Any one else have this problem or know of a solution?