I have a Villager Trading Hall of Librarians. I set this up before 1.16.0 and I’ve been playing a few days. The villager trades have somehow reset. The villagers in my trading hall have had the same trades since the beginning of the last two updates now, and never changed. I went to check the trades today to get the enchantment books for my armor, because I lost it in lava, and all of them except three have lost their name tags, and trades. After checking all villagers except the ones that have leveled up, have changed their trades. Their workstations were never broken, and again they all had been renamed via name tag and now no longer have their trades and are not even renamed anymore.