Platform: PC
Steps To Reproduce: Be a guest in Multiplayer. Loot a Robot (Have not tested on ammo boxes; did test on Tank and Hunter) and leave game to Host own game (Transferring equipment between characters for storage space). Return to same original Host’s game (Host did not leave robot corp’s area), and loot the same robot again. The original loot that was left is still in the Robots Loot Box, as well as an additional random Loot Drop. If Leave/re-enter/loot several times, the Robot’s Loot Box becomes several pages. 
Bad Exploit.
Host or Client: Client? (I was a guest, not sure if that means client).
Players in your game: 2