Any mob walks on soul sand, they stand still or does a full 360.
How To Reproduce:-
Step 1:- Go to the Nether.
Step 2:- Find Soul Sand Valley Biome.
Step 3:- Place any mob on 'Soul Sand' (Enderman, skeleton, zombie, piglins, hoglins, zombified piglins.)
The mobs stand still or perform a full 360 when they are on soul sand.
The mobs should walk slow on Soul Sand like a player.
Hoping this information is helpful to fix the bug.