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.
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Yes hopefully this is the same issue that has been resolved in 1.05, however the issue and release notes specify only hostile mobs, and do not mention villages, villagers, or passive mobs. I'm not able to test using Win 10 edition yet since beta program is not available to Win 10 edition users yet. Will test once 1.05 is released to Win 10 edition.
A quick test shows that it's still a problem in 1.0.5 I think. I threw together a simple world and looks like it's broken but you should test with your setup in case I'm seeing something else.
Confirmed still an issue in 1.0.5 on Win 10 64 bit. Please mark as a continued issue affecting 1.0.5.
Attached a test world where you can observe three oddities:
Villagers in the village (in the sky) stop breeding when the number of villagers on the ground increases, which should not happen because the bottom part of the contraption should not be a part of the village.
Villagers on the ground can breed when they have food, which also should not happen because they shouldn't be inside any villages.
Iron golems will spawn in the village, which also should not happen because there are not enough villagers in the village.
That was my understanding as well. FlnDutch has posted a .mcworld file in that thread which he says contains a working, stacked pair of villages (both producing golems at the expected rate). My Win10 machine is not easily available for playing MC so I haven't been able to try his world. I have not been able to duplicate the results on my own. I get behavior that would be expected if only the lowest village was active - only it produces golems. Villagers in the upper village will breed, however, up to the point where the villager count (total across both villages) matches the # of doors in both villages. Seems consistent with @Annie Ellico's comment.
Edit: he now reports that the upper village's population did transfer to the bottom village, as expected. He has some interesting results using water to phase the upper village in and out of existence, but it's not really a solution to this bug. So...nevermind I guess?
Ok this isn't a fix but it is more information on this bug https://youtu.be/pt3RyyJnQYU
Having the same problem with stacked iron farms. Village centers are approx 75-80 blocks apart vertically. Villages are both contained in one chunk. Lower village spawns golems normally, upper village does not spawn golems at all. Upper village will spawn golems if all lower village doors are removed. Playing in 1.9 on iOS. iPad Pro 2
Cleaning up old tickets: This ticket has not been updated recently (~1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.
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Hopefully this is the same as MCPE-12422 – which should be fixed as of 1.0.5 (in beta on Android). See the Fixes in the release notes @ http://minecraft.gamepedia.com/Pocket_Edition_1.0.5_build_1