In v1.04, villagers attempt to path-find towards a village that is more than 80 blocks away vertically. (While villagers will not path-find to a village 80 blocks away horizontally) In addition, villagers located 80 blocks below a village are counted in the size of the village affecting breeding mechanics.
Villages cannot be stacked on top of one another without affecting one another. (For instance an iron farm and a villager breeder) Villagers cannot be used as farmers without effect if a village is located 80 blocks above the villager.
- relates to
MCPE-12422 Vertical distance is ignored by the hostile mobs spawning rule