In the Suthesex region, in Porchester Fortress there is a hidden chest near the church. To achieve this it seems that you have to move a "shelf" and thus from the top of it jump to the door that gives access to the room where the chest is hidden.
The problem is that this shelf that is clogged with a box is impossible to move. Once you remove the box to clear the path of the shelf it cannot be moved and therefore I cannot connect the chest.
Does anyone know of the existence of this bug or is it simply that I am doing the wrong process to get the chest?