Mending for 10 villagers disappeared

After getting the hotfix, i noticed while going to my single player villager trading hall that my 5 mending trading villages (all for 10 emeralds) were gone. They are kept in safe boxed, with iron gates to protect from mobs, and i was playing peaceful. So i am sure they have not been killed. All other villagers were still there. 

 

Below: My villager trading hall as seen from my Fish farm, my fisherman for trading fish, still there, the entire row on the opposite side of the mending villagers still there, the ones opposite them on the other side, in the same hallway, still there. What gives?