2D projectiles are darker when facing downwards

Steps to Reproduce:

1. Be in creative mode, to easily reproduce this issue;
2. Be in flight mode;
3. facing downwards, throw any 2D projectile (potions, snowballs, eggs, ender pearls).

Observed Results:
The sprite is rendered darker than it should be.

Expected Results:
The sprite is rendered with its original color.

Screenshots/Videos attached: Yes