Iron golems spawning outside a 17X13X17 block space

I have an iron farm that has worked flawlessly throughout Bedrock 1.19 that is now regularly spawning golems outside the farm (i.e. outside a 17x13x17 blocks space from any of the bed pillows.  The village has no bell.  I have tried spawn proofing an addition 4 blocks out in all directions using both leaves and then buttons - and golems are STILL spawning outside the farm.