Random output in ClonerEffectorParameters does not work in Path Tracer?

Development Rendering
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1

I’ve been trying to randomize individual object color of Cloner instances in a material using ClonerEffectorParameters, but it does not seem to work in Path Tracer. It works fine in Lit/Unlit, but in PT, all the instances are colored as if the random value was 0. My actual scene is more complex, but here is a stripped down example with simply the issue I encountered:

random_output_pt_bug
random_output_pt_bug1024×512 69.4 KB

random_output_bug_mat
random_output_bug_mat1000×864 138 KB

Am I missing something, or is this an actual bug? If so, any workarounds I could use?

2

A small update: Since cloner instances are sort of Niagara particles, I tried using Particle Random Value simply piped into Base Color in the material. Got the same result: works great in Lit/Unlit, but not in Path Tracing. It doesn’t matter if I set the material type to Lit or Unlit.