Forge boss and Ancestral warrior totems

If you cast an Ancestral warrior totem on top of the boss, the game will place it right on the edge of the platform. If this happens, the attacks the little warriors do will have absolutely no effect. Seems like their effects are swallowed by the ground.

I was using the Earthshatter totem ability. On consoles (on a controller), totems are automatically placed on the highlighted enemy, so the totems are automatically placed on the edge of the platform.

I found a workaround, though, by walking away to the other side of the platform, a few meters further than totem placement range, and casting totems from there, totems were able to do damage.