Powder snow does not prevent fall damage

Summary:
Powder snow does not prevent fall damage.

Steps to reproduce:

1. Place a block of powder snow.
2. Stand in the center of the powder snow.
3. Switch to Survival Mode.

4. /tp @s ~ ~10 ~

Observed results:
The player takes damage when falling on powder snow.

Expected results:
The player does not take damage when falling on powder snow.

Notes:
This issue doesn't occur in 1.20.15.