Has anyone else noticed the Christmas present icons next to your character names while fighting bosses? Its a red & yellow box icon with a bow that appears in the same place as your spell/buff icons show up. They don't stay that long and seem fairly random

I had one in my character today when the boss dropped and I got a void helm. I.m wondering if this is a marker that you are going to get lucky.

I will try to get a screen shot...