Not sure if this is on anyone's radar, but had this happen today during huttball by the same BH Merc time and time again. Basically he would jump into the pedestal that held the ball. From their he could dps anyone yet can not be knocked back, attacked or pulled from that spot. Our team tried dpsing from melee range outside the pedestal area, tried range, I tried jumping inside but still could not hit him. The only thing that killed him was another BH Merc jumping in there and using tracer missile on him. This needs a fix asap.