Hi Kay,
Thanks so much for digging into this. I’ve tried removing all other Sphere Reflection Capture actors except for the one, and making the influence radius a bunch of different sizes (10k down to 500), rebuilding, and still am having no luck; tried simulating / playing (i think this is the first-person template) as well.
I’ve zipped up the project (vanilla 5.4) for reference here, I am hoping that I am simply doing something unbelievably stupid in my setup that would negate this from working.
Colin