Name tags and text displays no longer render darker when behind blocks or entities

The Bug:

Name tags and text displays no longer render darker when behind blocks or entities.

This issue did not occur in 1.21.1.

Steps to Reproduce:

1. Get two players and label them "Player A" and "Player B".
2. Get "Player A" to stand behind a wall and have "Player B" look at their name tag.

Observed Behavior:

Name tags and text displays no longer render darker when behind blocks or entities.

Expected Behavior:

Name tags and text displays would render darker when behind blocks or entities.