I have one scene that automatically crash if I connect two material blenders as you can see on the video below:
Here are some log files:
kit_20230216_144949.log (1.6 MB)
kit_20230216_162728.log (993.0 KB)
You can test the scene with this usd:
ai_pixel_process_apple.ov.v01.usd (38.9 KB)
You will need to download the USD dependancy from here:
I hope that you can find what is causing this.