Villager trade prices don’t increase after repeated trading in 1.21.10

In Minecraft: Java Edition 1.21.10, villager trade prices stay the same even after doing the same trade many times in a row. Normally, their prices should go up because of higher demand, but they don’t unless I hit the villager.

I tested this with several different villagers and trades (for example, Fletcher for sticks and Librarian for paper). Even after closing and reopening the world, prices stayed low. Only when I attacked a villager did the prices finally increase.

Steps to Reproduce:

1. Trade the same item repeatedly with any villager.

2. Watch that prices do not rise.

3. Hit the villager once.

4. Prices suddenly increase.

Expected Result:
Villager prices should increase slightly when trading the same item too often.

Actual Result:
Prices remain the same until the villager is attacked.

Version:
Minecraft Java Edition 1.21.10

Platform:
Windows 10