PhilB

Affects 1.20.4
Seed: -3611643821295031932
/tp 1790 -37 -80

Can confirm in 1.19.3
Seed 8533970638312418121
tp @s 201 67 213

Screen shots show some variations of the issue maybe not apparent in previous screen shots e.g. tall grass generating on top of water blocks, or crops.
Also when the wheat increases a growth stage it updates the water block next to it and floods everywhere.