Related, I have to use BetterDisplay to force a custom EDID since my xiaomi gaming monitor goes into YCbCr colour space and blacks become gray when connected to macOS. (Ironically the fix I was using before finding out about EDID patching and the cause of the problem, which I thought was bad calibration on my end, was to switch input source back and forth which somehow fixed the issue until the monitor was shut down)
I have similar issue on Dell S2722QC - when macOS picks YCbCr instead of RGB, the display is flickering (every other frame is dark). Both Windows and Linux always pick RGB, but macOS seems to pick at random. Very annoying, but technically the manufacturer only promises that the monitor works with Windows. I just unplug and replug monitor until it works, but will try BetterDisplay, thanks.
