Iron Golem are not spawning anymore

Put the summary of the bug you're having here

What I expected to happen was...:
I expect Golem spawn in my iron farm

What actually happened was...:
We play on a realms serveur with friend, the iron farm was doing his job but we upgrade the version from 1.21.1 to 1.21.2 and no more golem was here. None from the farm and none from the village.

Steps to Reproduce:
1. Do a Iron farm in 1.21.1
2. Upgrade the world to 1.21.2
3. No more golem