Good luck having bungie help with whatever your problem is. My upgraded exotics bumped back to level 300 damage after I've worked really hard to get them up to level 331 damage. I posted this issue three times in these forums and they absolutely don't answer it just goes into a black hole somewhere. Also I want to comment about others who say bungee doesn't do this or bungie doesn't do that; they don't work for bungie so I don't know where they get their information.

This is most likely game lag. But Bungie doesn't compensate for lost items so you'll have to find it again