Water floods farms that were generated on slopes

The bug

Gardens on hills have exposed water that washes away crops. Due to MC-140619, the water initially is still, but once a nearby crop grows, the water is updated and flows out onto the farm. Ideally, water blocks shouldn't generate unless there are blocks all around them.

How to reproduce

Last checked in 20w10a
Even if these seeds and coordinates do not show this problem anymore, it might not be fixed, instead maybe the world generation just changed.

/execute in minecraft:overworld run tp @s -9965.14 68.89 2093401.44 -336.83 34.20