I have a crowd of instanced static meshes that change color based on the per instance random node in their material. Everything works great in the deferred render however when I switch over to path tracing and move the camera the instances start to change color. The only thing I have found on this is that the Path Tracer does support per instance random, but nothing else.
Below is a video showing the setup in the deferred render first then the path tracer.
Updated recording with the raytracing debug of the instances