Not a huge bug, but a bug all the same. On repeat runs, the final encounter of Prophecy will [i]appear[/i] to have not given a drop; in reality, though, the items have simply gone directly to Postmaster, even if you have free slots for those items. See link for video evidence of the bug. EDIT: Potentially just a really bad string of luck, but neither me nor my clanmate who I've been farming with don't seem to be able to get anything other than armour from these 'ghost drops.'