I built a trading hall and locked 20 villagers into cubicles to make trading easier.
-Each villager is next to their personal workstation.
Once they are in their cubicle - they cannot reach their beds. I then broke and moved the beds down a few layers to make room for an iron farm above the beds.
1: Iron Golems are not spawning
2: The villagers are not refreshing their trades.

I have tried moving the beds into different formations, in case stacking the beds was a problem.  When I place the beds, I notice that there are never green particles. 

Although I have my personal bed, I am only using it to sleep and then breaking it (putting me at risk of teleporting back to spawn!). When I place my bed to sleep, there are no green particles claiming it either.

I have slept a few nights, and the villagers are not resetting their trades.