Signs Are Rendered Much Brighter Than on the Previous Versions

For a demonstration, please check out the two attached screenshots and for the most repressive experience the attached video.

Steps to reproduce:

1. Place a sign (doesn't matter if hanging or the normal variant) in 26.1

2. Take a screenshot

3. Upgrade your world to 26.2

4. Take another screenshot

5. Compare the results

6. Observe that the signs in 26.2 are brighter.

This is especially noticeable on the side surfaces of the signs, where normally they should be quite a bit darker than the front. The 26.2 version makes the signs seem a lot flatter and like they're not really part of the environment, because their lighting feels just off.