Edit: bug report can be closed, the issue fixed itself somehow

This is not a duplicate of MCPE-33751!

I have a chunk aligned iron farm that won't spawn iron golems, unless I remove all the water blocks. Then they appear. If I put the water back again, the iron golems stop spawning.

Conclusion: Iron Golems refuse to spawn in Update Aquatic's water blocks.

Again, this is not a duplicate of MCPE-33751. I found out more info.