mercenaries not dropping gear on defeat.

While no issues with them dropping their currency, every time, in maps I have challenged a Merc for a piece of gear, you win the fight and they drop nothing. I have missed out on a number of great pieces of gear because of this. Seems to only be an issue in Maps. For example, I just challenged a merc for an amazing set of boots with movement speed and triple res. Dropped nothing.

Loot filter perhaps?