I lose HDR (washed out color) when I focus on the game

[MDuh]

I don't get this.

I have a HDR monitor,
I have enabled Windows HDR on display settings.
I have forced nvidia control panel to use Nvidia color settings with 12bpc and full dynamic range.

When I switch to another window or even just press the windows key, I see the beautiful HDR colors. But whenever I focus on the game itself, the colors become washed out.

Has anyone experienced this and have fixed this?

[GrandTickler]

so im gonna make a random guess here. do u happen to use a 2.0 hdmi cable with a 4k resolution? if so, 2.0 does not support 4k+hdr, you'll need a 2.1 cable for that.

as for why it works when it loses focus in this case. maybe it reduces the resolution when its out of focus?

theres a list here of what the max each version hdmi cable can handle:
https://www.cnet.com/tech/home-entertainment/what-is-hdmi-2-0b/

[MDuh]

I'm on DP and windows is reporting color space is HDR bit depth 12. I don't think this is a cable issue at all.

Again, I see the proper HDR colors when the game is not on focus, once I focus on the game, I get washed out colors. The resolution of the game is the same as monitor's native resolution

[Wintlink]

I gave the same issue on Horizon Forbidden West, does anyone have any idea ?