[Bug]Crashed Using Trading Post

I built a iron golem farm and put a Trading post under the Villager "pouch". Upon clicking it the crashed.
I restarted and tried again, This time the GUI opened, however I realized some trade were missing, I opened and 
closed it several times, the 5th time it crashed again.
I had Optifine installed, but when i read that Optifine causes some issues I removed it and tried again. 
Same-thing Happened, it opened but some trades missing, and crashed again after a few times reopening it.
I also noticed that the trading post doesn't have a bottom texture.