Crimson roots can generate on soul soil in soul sand valleys

The Bug:

Crimson roots can generate on soul soil in soul sand valleys.

Here is an example:

Version: 1.21.4

Seed: -326284816351374599
Coordinates: /execute in minecraft:the_nether run tp @s 15.45 51.96 -438.71 -159.52 27.52

Steps to Reproduce:

1. Generate a world with the seed provided above and teleport to the given coordinates.

2. Look closely at the crimson roots and their surroundings.

3. Take note as to whether or not crimson roots can generate on soul soil in soul sand valleys.

Observed Behavior:

Crimson roots can generate on soul soil in soul sand valleys.

Expected Behavior:

Crimson roots would not be able to generate on soul soil in soul sand valleys.