I'm not sure if this is a bug but more an issue.... When doing the Peerless Goblin spawn when the two bosses spawn sometimes one will spawn in the lava or on the other side of the bridge or behind this little hill and you can't damage them with out using something like wildfire our thunderstorm. I think the spawn just needs to be a little smaller so the bosses and a few of the goblins don't spawn in an almost unreachable spot. Below is one of the pictures.
