Hey, Krandus!
This appears to be a shader cache issue with AMD drivers. We have a forum post about this here: Wow randomly crashing since 8.1 - #9 by Ibaraius
If the recommendations in the thread do not work, you may want to try a clean driver install to see if it helps:
- Start with a clean video card driver install. This will default all AMD settings, along with removing any possible corrupted installation. Completely uninstall your AMD drivers using: http://www.wagnardsoft.com/
Instructions for the Display Driver Uninstaller: https://www.wagnardsoft.com/content/ddu-guide-tutorial
Here is a video walk-through, also: https://www.youtube.com/watch?v=ZxiLwLCxmkk
- Download the newest driver and install it: https://support.amd.com/en-us/download