Zombie villagers that have been cured slowly increase their price back to normal after being cured.
For example, I had a villager that I cured selling a Sharpness V book for 1 emerald and every time later after I wanted to get more I came back and it increased in price each time.
Linked issues
Comments 2
Duplicates MC-154929 (works as intended).
This bug was fixed in 1.14.4 PRE-RELEASE 4. Of course it will be a bug in 1.14.3