okay, for right now I accept. Slices are bad, mhkay?
Maybe for the future you check if that needed hearthling is rendered or not and if not, disable slices automatically before that jumping position thingy.
Do you simulate not-rendered hearthlings or are they really off-duty?
With my old projects we had two different possibilities hiding things ingame;
Hide() which really disables the model from rendering
SetFlag(OF_HIDDEN) which only sets the model position to Position+Vector(0,0,-999999) … that´s lame and not good coding but it worked for us.