My experience: I had a trading hall with villagers trapped in separate fences. After updating, one of my villagers was stuck in the floor. I freed him and he immediately got stuck in one spot. He laid on the floor and wouldn't move no matter what I did (water, hitting, pushing). Also, his trade (Mending I) was changed to Fire Aspect I. Two of my other villagers have swapped trades as well.

tldr: villagers' trades have changed after the update / villager got stuck in place