Washed out HDR on passthrough HDR

You have a similar problem to this:

Your Yamaha is not passing through HDR capabilities (or even deep colour) from your TV. It seems you’ve had issues with EDID reading in the past since you have a disp_cap file. Do you have more than one display like @Adam1V or some other special set-up that’s causing the EDID to be lost on it’s way from your display?