Player hitbox outline isn't rendered after switching to "Fabulous!"

The bug

If you have "Fabulous!" on while hitboxes are shown (F3 +b), the hitbox outline isn't rendered when viewed in the inventory.

To reproduce

1. Do F3 + b to show hitboxes

2. Have "Fast" or "Fancy" graphics settings on

3. Open your inventory
   → ✔ The hitbox outline is there

4. Have the "Fabulous!" setting one

5. Open your inventory again
   → ❌ Hitbox onlines are still shown, but the player in the inventory isn't

Video