VERY SERIOUS KARTHUS ON ASCENTION BUG

WHen Karthus dies inside the Ascention ring, his passive ghost is still taken as a champion inside the ring and doesnt let the enemy team get the ascention, even though he is dead . I dont know what happens if he is dead and is alone inside, because my team was all the time inside it with him, but he is dead and still takes the ascention spot. This was really annoying, MUST BE FIXED