Water in savanna village farms can generate in invalid states on slopes

The Bug:

Water in savanna village farms can generate in invalid states on slopes.

This issue is specific to savanna village farms since these farms follow the terrain when generating, thus sometimes exposing the water. The water doesn't tick at first so it just remains still, but once the crop ticks, it then causes the water flow, ultimately resulting in savanna villages on mountainous terrain being overrun with waterfalls.

Here is an example:

Seed: -8810289815584221700
Coordinates: /execute in minecraft:overworld run tp @s -2108.17 65.74 3277.22 -397.11 38.42

Steps to Reproduce:

1. Generate a world with the seed provided above and teleport to the given coordinates.
2. Look closely at the water within the savanna village farm.
3. Take note as to whether or not water in savanna village farms can generate in invalid states on slopes.

Observed Behavior:

Water can generate in invalid states on slopes.

Expected Behavior:

Water would not be able to generate in invalid states on slopes.