The right/left front legs, back legs, and horns of a ravager cannot be independently retextured

(This issue first appeared in the snapshot Minecraft 18w43a)
The right/left front legs, back legs, and horns of a ravager cannot be independently retextured from one another, making them always look the same. This is limiting to the player's resource pack creativity and freedom to edit the texture.

Steps to Reproduce:

1. Download and apply the following resource pack:

1. Spawn/Summon a ravager

Observed Behavior:

The both the right and left horns, front legs, and back legs will look entirely red, despite the player seemingly only modifying one of each respectively in the UV map.

Expected Result:

Only one of the horns, front legs, and back legs would be altered, since that is what the player intended to change. The current behavior is unexpected and not resource pack friendly.

Screenshots/Videos: