I can't get red colors at all until I edit the Whitelevel Red value in the color calibration tab. When I change the value back to 255 and click send Trans, everything is back to normal.
So I tried making sure this value is set to 255 by default.
I saved my Hyperion Config. I had an issue where saving it gave me a .json file showing a value of 0 anyway... but I fixed this by starting from scratch (without any .json loading at first) So now my .json config file does show redChannel = 255.
So now I go over the SSH tab, select the .json file and send config to my pi zero... but the issue is back as soon as I stop and restart Hyperion.