There is a naturally generated village right next to both the world spawn and my base which currently has six iron golems: two along the edges of the town, three fountain with the bell, and one stuck on top of a house roof with no way to get down.  I've added three houses which each have two beds and four doors, but I don't think that any new villagers have been bred since the lectern I place next to the well hasn't picked up a librarian yet, and the few times I've need a pair of villagers generate hearts the display of hearts ended with the "angry cloud" effect.

Two things that result in the villagers gossiping a lot more than usual (since gossip is now what generates new iron golems):

1.  The world spawn and my base (which I spend a lot of time at/near) is right next to the village, to the villagers are loaded and active a lot more than normal.
2. I've placed all of the job station blocks right next to the town's fountain (except for the town's three farmers) meaning that the the villagers are close enough to gossip even when working (assuming villagers need to be physically close to gossip).

The only changes I've made to the village (besides the three new houses) is to move the weapon smith's blast furnace block from his workshop to next to the fountain, added several profession blocks of my own around the fountain, used the Dirt to Path mod to add some paths to the front doors of the new houses, and also repeatedly removed and placed back several village profession blocks in order to change what associated villager traded at the novice level.

Might merely be a duplicate of MCPE-47157 (Iron farms are broken as well as unbalanced) assuming that the cause of the bug is village mechanics shared between Java and Bedrock. I'm also suffering from MC-150806 (Multiple villagers are attached to the same profession block) in case that has any relevance.