Me and a friend just did the first mission of the Who Will Die Episode 2 TF, both level 30. They went AFK and I started beating enemies in Talos Island when a Tsoo Green Ink Man minion, sitting 7 levels below me at level 23, gave an enhancement converter. No other enemies dropped anything, and so I kept hunting massively lower enemies in talos to confirm. I only got the ONE enhancement converter, indicating it's the only item bugged this way, as I hunted a good hundred enemies without looting anything else.