NPC heads turning incorrectly visually

NPC heads turning around in two layers instead of turning together.

 

Summary:

When playing through any of our content when NPCs are turning their heads it is done in two layers instead of together.

Impact:

This content is currently live on the marketplace and it looks weird and clunky.

Repro Steps:

1. Download the content "My Gorilla Adventure" (for example) from the marketplace
2. Start a new game and walk forward to meet the NPCs Dian and Whysa.
3. Move around the NPCs so they will turn their face to you.

Observed Results:

While NPCs are turning to you first their face parts turn to you and after that their head parts like hair are turning to you.

Expected Results:

NPC turn head in a smooth animation.

 

Screen shots and video attached.

 

This was working OK in R7. We started seeing this issue in R8.

Tested this today on 1.9.0.5 - Beta 4, RC1 and it looks resolved on the NPCs using Skeleton but not on the ones using wither_skeleton. You can see an example in the spawn point of Obstacle Combo.