Wither visuals don't function properly with Ray Tracing

In the second stage of fighting the Wither boss (when It's at Half health points) some moving Lines appear around it (without ray tracing), which is a part of It's visual, but this doesn't function with RT turned on.

The wither at half HP:

in this stage the lines have an animation/they move while with ray tracing It all becomes a blocky mess.
The Wither at Half HP with Ray tracing:
 

Steps to Re-produce:

1. Enter a Ray tracing enabled world or activate a pbr resource pack in your own world
2. Summon a wither boss
3. Take it to half HP
Observed results: Wither texture is broken with ray tracing on.
Expected results: It should look similar or better to how it is with ray tracing turned off & animations should be present.

additional info: this only affects second stage of the wither, before half hp