Issue: Villagers that are turned into zombie villagers do not save their trades after being cured. After being cured, the villager will have turned into a completely different villager. Meaning that once cured, the villager will have completely different trades and profession.
How to Reproduce: Spawn a villager, then link said villager to a bed, and workstation. Then trade with the villager at least once in order to lock it's trades. Turn the villager into a zombie villager by spawning a zombie. Once the zombie turns the villager into a zombie villager, give it a golden apple, and splash potion of weakness. After being cured, you will notice that the villager has completely different trades, and a different profession.
Correct Behavior: After curing a zombie villager, it should retain the same profession, and trades that the villager once had, before the villager was turned into a zombie villager.