Villagers not Grateful After 1.16.100

Since I enjoy having my trading halls be easy to use without needing to carry plenty of emeralds around, I de-zombify wild villagers. I had gotten around 20. But, when 1.16.100 came around, all my trades we back to being inconvenient (a stack of emeralds for a mediocre book). I did not even harm the villagers, it happened by itself. Please help!