Objects thrown while standing on soul sand fall on the block where the player is.

Objects thrown while standing on soul sand fall on the block where the player is.
So when standing on normal blocks the items are thrown to a certain distance from the player (depends on the angle of the camera but looking at the horizon it's more likely to 2-3 blocks away) and using 1.20.1 (not sure if it does that in other versions as well I didn't check) while standing on soul sand the items thrown are falling at the feet  of the player like it would have a wall in front (whatever the camera angle)