Player-made iron golems run away from villages

Updated description by [Mod] GoldenHelmet

Steps to reproduce

1. Stand in a village (1 villager and 1 claimed bed is enough).
2. Spawn an iron golem using iron blocks and a carved pumpkin/Jack-o-Lantern.
3. Observer the iron golem for a while.

Expected result

The iron golem patrols the village, staying within a certain distance of its center.

Actual result

The iron golem wanders without regard for the village and eventually wanders far away.

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Original description
Iron Golems are constantly running away from the villages I spawn them in. It seems their AI doesn't recognize the new villages, because instead of guarding and patrolling the new village, they run, somewhat erratically, all over the place until they leave the village and get lost. This has happened on multiple occasions, in different worlds I've created.

Other than this, the iron golems seem to behave perfectly normal. They kill mobs as normal, avoid water and everything else. It just seems they can't recognize the new villages as places they are supposed to protect. Also, every iron golem this has happened to has been spawned by myself, and I've only played in creative mode, if that means something.