Certain blocks will render through an invisible spider's eyes

The bug

Invisible spiders are special in that their eyes are still visible and glow. However, if they are in front of a sign, the sign will clip through the eyes, making them invisible. Happens to dyed signs, signs of any type, regular spiders, and cave spiders.

Affected Blocks

• Signs
• Beds
• Chests
• Shulker Boxes
• Mob heads/skulls
  List may be incomplete

How to reproduce

1. Place a sign
2. Summon a spider next to the sign, using the following command:

   /summon minecraft:spider ~ ~ ~ {NoAI:1b}

3. Splash the spider with invisibility
   → The spider's eyes render behind the sign