For some reason, if I copy/paste drawings on the DL layer the interface will freeze up and the object will appear in the top left corner. No objects can be interacted with and no menus can be clicked. If I then right click it makes it so I can interact with menus etc, but the map behaves as if I had right clicked and not let up, so it moves around. The only way to sort it then is to log out of the campaign and then log back in. I am on Windows 7, Firefox.