Snow / powder snow can generate underwater

Snow and powder snow generates below water on snowy slopes and some other biomes.

Expected result

Snow wouldn't generate underwater, specially powder snow, which shouldn't even survive there.

How to reproduce

Seed: 4157219471400150689
Coordinates: /execute in minecraft:overworld run tp @s -475.02 59.68 2427.13 -230.85 11.55