Maliwan take down not dropping it’s dedicated loot

First I’ve had a few problems with the buddy system modifiers, when they’re stuck in wall and Player is unable to kill the adds. Second wo tan isn’t dropping his dedicated loot. I ran it twice on Mayhem 10 TVHM and get nothing is very disappointing. So then I looked to YouTube and seen many content creators complaining about the same thing and yet no comment from gear box about a patch nor fix in the future…