The right and left arms of a snow golem cannot be independently retextured

The right and left arms of a snow golem cannot be independently retextured from one another, making them always look the same. This is limiting the player's resource pack capability and creativity.

Steps to Reproduce:

1. Download and apply the following resource pack:
   SnowGolem.zip
2. Spawn a snow golem

Observed Behavior:

The right and left arms of the snow golem will look entirely red, despite the player seemingly only modifying one of the arms in the UV map.

Expected Result:

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

Screenshots/Videos: