Well, this was the second time that I got no drops at all from a boss fight, when I say 'no drops at all', it is no drops at all. Not even gold, experience, snack, cards... nothing. I'd like to know if the Developers are aware of this issue and are trying to fix it, as it is quite inconvenient and even frustrating.
Thanks in advance for your time and look forward to hearing back!
I have seen this, but not often, its rare. If in with a group, and you don't get a spell cast (some rounds are that fast, depending), it is possible that no drops went your way. If your bank and backpack is full, sell off some stuff.