Iron golems do not spawn since 1.16.0

Dear Community,

I have a problem with Minecraft since the publishment of v_1.16.0. 

Iron golems do not spawn. I noticed it, when I control my iron farm. The number of iron stays the same and after hours nothing is changed. I also have controlled my normal village. I have killed all golems but there are not any new ones until now. In the past they were spawned after max. 10 min (in the village). The village and the farm are accepted from the game and they are more than 21 beds and 10 villagers and iron golems can still create by building them, so I cannot understand this bug.

I hope you can help me and excuse me, when my English is not very good. It is not my mother tongue.

Yours sincerely,

Blue1234