I made a village with at least 20 villagers in peaceful mode. There is a fence around the village, so the villagers won't leave.
The village has four iron golems.
I decided to build a new village far away. It took 50 minecraft days to build a decent village with villagers.
When I came back to the first village, almost all villagers are gone. The four golems are still there.
I suspect it could be a glitch or maybe New Nintendo 3DS version is limited.
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