It is the 2.20 Patch, and I was testing out Ah Puch, when I realized that you can kill the gold fury without even making it aggro on you.. If you stand far back enough, that is.. Hopefully this doesn't carry on to Conquest, Clash, etc.
Pictures here.
I'm not sure if this is a bug or not...

I know these are bad pictures, but I don't have any recording software.