In the 10th level of the Phantom Overlord Orc Campaign, there is a room with three stones in the poem sequence. How to get past it?

There is a bug in this level. In one room, kill a stone man with 5000 blood and summon two stones. Find a soldier to lure the little ghosts in the next room to the poetry stone room to kill them. After falling, throw the two stone men directly into the next room and kill the remaining imps to pass the level. I passed it.