Powder snow no longer slows down the player falling from a high place

If a player falls from a high place like 50 blocks above the ground and lands on powder snow, it doesn't make the player fall slowly. This issue doesn't occur in 1.21.3.

Steps to reproduce:

1. Place some powder snow on the land(2~3 blocks above, to make the issue more observable)

2. Stand under the powder snow and run /tp ~ ~50 ~

Fall damage sound which used to play on powder snow is gone too, temporarily fixing MC-250184.