The demand values for villager offers will increase/decrease, seemingly without limit, over time, instead of steadily tending towards 0. This can quickly lead to demand values in the thousands, resulting in either permanently expensive trades, or trades that never become more expensive due to demand.
MC-156574
Villager demand values increase/decrease indefinitely
Resolved
Fixed
1
Community Consensus
Important
Trading
Minecraft 1.14.4 Pre-Release 5, Minecraft 1.14.4 Pre-Release 6
1.14.4 Pre-Release 7
Retrieved
I am encountering the same issue in 1.14.4-pre6. To replicate, take a new villager and give him a brewing stand. Trade 10 Emeralds for 20 Redstone dust. Every time the villager uses his workstation, the demand for that trade will increase by 16. After roughly 2 minutes, the trade should cost ~4 Emeralds. The price continues to escalate to infinity and beyond.
I would also like to point out that the villager seems to use his workstation an unlimited amount of times per day while this is going on. I believe villagers are supposed to work just twice a day.