Entity shadows can be seen whilst inside of powder snow/lava

The Bug:

Entity shadows can be seen whilst inside of powder snow/lava.

Steps to Reproduce:

• Turn on Entity Shadows. (Options > Video Settings > Entity Shadows: ON)
• Spawn several entities in a large area of powder snow or lava.
  →  Notice how you can see the shadow of entities.

Information:

This issue did not occur in 21w08b.