Updated my world from 1.14.2 to 1..14.3 and within half an hour all villager discounts were reset to their starting point/default. Even super discounts such as from healing zombie villagers reset. Trading also doesn't seem to lower their prices anymore.
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Duplicate of/related to MC-154929
Having played awhile longer now, it seems villages in general are just broken. Once trades and gossip reset, it seems impossible for me to get them to breed, lower prices etc. I've also not had a wandering trader spawn in a good 10 hours (since some trades were still discounted), when they previously showed up quite often.