If you look around your world close enough, you'll notice that sands can generate on water springs/waterfalls and on the village's crop farm. This shouldn't happen as it feels out of place and doesn't make sense.

My suggestion is to just not allow sands to generate below flowing water and only generate on non-flowing water blocks, as well as not generate on any villages at all.

How to Reproduce
1. Generate a world with seed 8353354.
2. Find any water springs/falls.
3. Also check the village with the crop farm (135, 126, -365)

Observed Result
Sands generate where there are any water springs/falls, and the village's crop farm.

Expected Result
Sands should not generate on them.