Skins of many entities (I got it easily with piglins) can often appear to jump between two sizes quickly, or faces will randomly disappear or reappear. 

According to users in the Minecraft RTX Discord Server, it's appeared on Villagers, Drowned, Pigs, And Piglins
Steps to Reproduce:

This bug will happen randomly with many entities, but I was able to quickly and repeatedly reproduce it by spawning in a bunch of piglins until one appeared glitchy.

Expected Results:
The entities will appear the same as without RTX

Another Video Link:
https://drive.google.com/file/d/1RV9r8JjzkcFm0zsJscs1Y4LJRCPWiVR9/view?usp=sharing