Golems disappearing from farm in chunk containing many things.

1. I played in survival mode.
2. I have fenced farm with many animals (chunk was rich in few tens of animals, and about  10 full double chests),
3. I placed 5 golems in it,
4. I went to Nether, End and I spent equivalent of few game days there.
5. I came back with new things in inventory and did put them in chest and visited my farm.
6. All Golems in farm were gone.
7. Golems created in neigboring vilage did not disappear.
8. Everything else (chests, animals, stuff in chests in this stuff rich chunk) did not disappear, and behaved well.