The end of the dungeon duality is bugged, at the end it is in a loop without taking the loot room and the loot is always sent to the post office, torso armor and machine gun, not to mention that even though I finished the dungeon almost 90 times I couldn't get the exotic weapon, the sword, that is, when you buy the dungeon it's not guaranteed that you'll get the exotic weapon, but just a possibility given the circumstances, unfortunately.