Mushrooms on invisible bogged do not render when viewed from certain angles

The mushrooms on an invisible bogged's head will not render properly, or entirely when viewed in spectator mode, or when the entity is on the same team as the player.

Steps to Reproduce:

1. Spawn a bogged

2. Make it invisible:

   /effect give @e minecraft:invisibility infinite

3. Change gamemode to spectator

Observed Behavior:

The mushrooms on the bogged's head will not be visible entirely from certain angles:

Expected Result:

The mushrooms would be visible at all times, regardless of the entity's effects, or the gamemode the player is in.

Fix:

One possible fix is to copy the textures of the 2D mushrooms to the opposite side of the plane. (This does cause z-fighting though, likely due to another underlying issue).