I was yesterday doing the final stage of the twins heroic mode and kept on killing the sapphron drakes. They gave me 1916 gold according to the info on the units. But several times when I was vaulting it, I noticed that after pressing vault, the 1916 changed to 15xx of gold instead! When I killed Magnus as the last one, the same happened, I lost like 20% of the loot while vaulting it. Anybody else seen the same?