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

The Bug:

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

Steps to Reproduce:

• Turn on Entity Hitboxes. (F3+B).

• Spawn several entities in a large area of powder snow or lava.
  → ❌  Notice how you can see the hitboxes of entities.

Information:

This issue did not occur in 21w08b.