What happens if you drop the hammer after filling up the mould and mythral ? That's the normal way to descend the platform. Perhaps the game will set itself to the normal descended status if you do this, even when you're down already from a graphic viewpoint ?
You would think, but usually with this bug, there is no returning to normal. All you can do is never click the forge in the wrong order. You need to load a save from before you have touched it to actually fix. (Noteworthy: Grym dying or someone in the party dying on the hammer can cause a different bug with the same consequences). There's like 5 families of Grymforge bugs which are pretty similar, but not identical, and then you have the inventory issue. Even worse, it's been this way since release.
