In the room with the hero's bow in (after the bridge) there will be a lot of beamos statues. Heading to the South one and killing it without heading back is NOT smart. if you headed back before killing it you're alright but if u dont the rest of the statues stay dead BUT you cant move them. Behind one of them is a room to the last key shard. If u cant move them u activated the glitch. U will have to save the game and reload your save. You will be at the beggining of the dungeon but the cranes are activated.