Hello
I've countered a strange issue with my LG CX "I use exclusively as a PC monitor". The color depth changes from 10 to 8 and pixel format from full RGB 4:4:4 to YCbCr 4:2:0 every time I turn the TV off and turn it on after an hour or so. To restore the settings I have to disable and re-enable AMD Freesync from the TV menu. I do use an Ultra high speed 2.1 HDMI cable ( Zeskit )
GPU: AMD 6800XT with the latest driver (20.12.2)