I have been having this issue for about a week now. Whatever the last update was. While there may not have been any official windows 11 support, HDR has worked just fine for me up until last week. It is not cool to go from glorious HDR to SDR for sure, but I have been dealing with it. There is hope on the horizon though, as laid out in bungie's weekly update: [quote]Destiny is a beautiful game, and we want our players to enjoy the majesty in all its glory. Our resident magical space wizards (aka the Destiny devs) have cooked up some amazing new solutions to take the adventure we love and make it even more stunning, thanks to some new updates to our High Dynamic Range (HDR) implementation. Here’s what you need to know about the HDR changes launching next month with The Witch Queen: Windows 10 (and up): Windowed HDR is now supported. To use windowed HDR, players must have the in-game HDR option enabled, and Windows 10 configured to have "Use HDR" enabled for the specific display. When playing Destiny in windowed HDR, the game will automatically swap between HDR and SDR if the window moves to a display without HDR support. All players (SDR or HDR) that use the software OBS on Windows 10 (and up) with Window Capture: ensure the ”Capture Method" is set to "Windows Graphics Capture" or capturing will display a black screen. The BitBlt setting will continue to work for previous versions of Windows. Windows 10 (and up): Windowed Fullscreen should provide the same (or better) performance compared to exclusive Fullscreen. Under the hood, Destiny now uses DXGI flip model on Windows 10 (and up). Dig it and want to learn more? Check out more detailed information, which can be found here. Screenshots are now supported when playing in HDR on PC. Screenshots must be taken using the in-game screenshot feature. HDR screenshots will be tone mapped to SDR and saved as lossless PNG files. Display calibration improvements (all platforms). Players in HDR will see an updated calibration UI screen to adjust their settings. HDR calibration settings have been updated with friendlier functionality to accommodate the wide range of HDR display capabilities and viewing environments. SDR and HDR calibration settings are no longer stored account-wide and old settings have been reset. Display calibration settings are now stored per-platform: PC, Xbox One, Xbox Series S and X, PS4, PS5, and Stadia. SDR brightness settings no longer affect the game when playing in HDR. Xbox players going through new account bootflow will no longer be incorrectly shown the SDR calibration screen if HDR is active.[/quote] I really don't want to wait another month for it to be fixed, but so far my forum post on the matter has gone unanswered. I'd say probably because they are actively messing with it. EDIT: Somehow I missed that you'd already read it! Whoops. C'mon bungie, I want my colors and contrast back!

Windows 11 is not currently supported so the issue be from that.