Lootbugs?!

I was playing with 2 other peolpe together.
We´ve found a treashure goblin and have killed him.
After that , I would went back to pick up the gold and then I saw another player collecting my gold-drop. So i belive there is a lootbug/loothack.
Well, before that it was a little bit strange because more than 5 players joined the game and left it instantly.