Hi @Liersi What’s your video chip version (Settings > About)? And are you using HDMI for your measurement pattern generator, or is Android somehow involved? What EOTF tracking do you get when you “RESET” the hidden sliders from this thread i.e. without the ‘corrections’ applied?
Also, HCFR uses single shot measurements and doesn’t wait long enough to integrate the measurement in my opinion. Are you able to try with LightSpace or CalMAN too? Or tweak HCFR to dwell longer or take multiple shots per colour?