I recently started a new Dig Deep map (after the last update). I have found a rare item in a spiders chest but the texture is a padlock. You can put this item in your inventory and it will display the actual texture but if you place it in a chest it will go back to the padlock (any chest). You also can't sell the item as it isn't in the shops. To resolve this the player will have to throw the rate item onto the floor and pick it up like that, I haven't tried pressing Y.
Hope this can be fixed for PC..