Had this happen a few times. Got all the way through the Arah story mission without a single mob dropping a single piece of loot for any of our party. (One person did claim that maybe he got a moldy sack)
The rest of us were on skype, and none of us got a single drop.
We got the the part on the mega airship where we have to defend zoja. (sp) Then we all got loot like we normally would have.
The bosses all still dropped loot like normal, but none of the mobs dropped a single piece until the final airship battle with Zhaitain
This has happened on the past two runs that I have done on story mode.
Is this a bug?