I placed a village in my World then i noticed a shadow where no shadow should be 

I tried to go there but it woudnt let me

then i placed grass blocks there and they turned into hay blocks because it was one of those hay things in a village

What i did for this bug to happen:

• Do /place structure minecraft:village_plains
• Search for weird lightning 
• try to go there
• place blocks that turn into hay bales

I think only hay bales are affected and that this only happens in /place villages