I think they changed the way raid chests work this week. When I was doing Crota raid for the first chest, it randomly moved locations every time I died. I saw it in the 2nd 'free' location, died, ran back, and it wasn't there. Died again and went to check the easiest 'free' spawn spot right near the zone-in (I already checked it a few deaths ago), and the chest was there. Very weird but I guess it doesn't change much.
Got my first non-shard loot from the chest too...but of course it was one of the few good exotics I already own (Suros Regime).