Bungie released a new hotfix for Destiny to fix a number of issues with quests, loot chests and whatnot. The full patch notes can be gleaned here. In short, if you were playing the original Prison of Elders modes for loot and weren’t getting anything from the chests, then you’ll be happy to know this has been fixed. The quest “With Finesse and Speed” has also been fixed so it can now be completed and Ghosts dropping in the Nightfall will now drop above your Light level.
Source: Rheena.com