Windows 10: Green tint on screen after March 28 updates

I'm on 1909, and after the last couple of Quality Updates, installed on 03/28 (KB4551762 and KB4537572), every time I turn on or restart my PC, my display has a green tint, as if the HDMI bandwidth has exceeded what's supported by the panel (I've seen it happen when trying to run older games supersampled to 8K, with YCbCr422/10 or 12 bpc - fixed by switching to RGB/8 bpc).

My display is an LG OLED C9 (which offers native 4K@60Hz or 1440p@120Hz), and my GPU is a 2080 Ti, running the latest drivers (445.78). I checked the Nvidia Control Panel after booting, and noticed that Windows was defaulting to the first TV resolution of the list, under "Ultra HD, HD, SD": 4k x 2k, 3840 x 2160 at 60 Hz, with YCbCr422 and 12 bpc as the color format and depth, respectively.

The actual native resolution, added via CRU (Custom Resolution Utility), is listed under "PC": 3840 x 2160 (native), at 66Hz. I made sure to include it at the top slot in CRU, under "Detailed resolutions", in order to truly make it the native res and the one to which Windows defaults after booting, which worked perfectly fine until a few days ago.

After the March 28 updates, Windows started defaulting to the incorrect (non-native) res, which is still technically supported and shouldn't be causing any issues. In fact, switching the resolution/refresh rate and color format/depth after the initial boot causes the green tint to disappear and the image to be displayed correctly. Switching back to the initial default settings set by Windows does not cause the issue to occur again.

Any ideas as to what's going on and a possible, definitive fix?

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:)

 

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Green Screen Tint Image:





With all colours:





You can get this (Original Image):





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