Axolotl feet double up when RTX is turned on

I'm attempting to create a custom higher resolution realistic texture for Axolotl's and noticed the feet and legs appear to double up and look glitchy when RTX is turned on but look fine when RTX is turned off.

Here is a link to the pack if you want to check out the glitch: https://drive.google.com/file/d/1PY0YRGuxf8Q3fSUmqYZgJfNohj1q8An_/view?usp=sharing