Half of my villagers despawned/randomly disappeared

Put the summary of the bug you're having here

What I expected to happen was...:
All of my villagers in my area to stay put as they have been there for a long time in my survival world.

What actually happened was...:
Half of my villager despawned/randomly dissapeared when i was farming potatoes right near them half of the villagers in my trading station are there and half despawned/Disappered. Version 1.21.4

Steps to Reproduce:
1. Traded with farmers for emeralds
2. Farmed potatoes near by
3. Half of the villagers were gone.