Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)
for some reason, my RED one MX Build 32.0.2 cuts the highlights and over cranks them, they seem red too. Don't know how to explain this further, just see the screenshot of redcinex.
Your ISO is at 100. So likely you were clipped even at around 800, and so bringing it down just brings down the brightness of your highlights to 80%, but there's no additional info there...
You need to be shooting at a higher ISO (to brighten the rest of the image) and stop-down your lens aperture more or add ND filters (to bring the highlights down within the camera's dynamic range). The highlights have exceeded the camera's dynamic range.