Nvidia bug affect both madVR passthrough and Pixel Shader with HDR output enabled, Do some comparaison by playing your HDR content using TV internal media player and you will see what i'm talking about.
But if you ask me, Pixel Shader with HDR output enabled is the best of the worst.
I was digging arround nvidia forums and i couldn't find a single topic about this bug, so time they hear our voice. and maybe madshi could help us by using his NV contact.
https://forums.geforce.com/default/t...-hdr-metadata/
Edit: haha madjock was faster quoting my own post