Hi,
I run a 5700 XT via HDMI to my LG CX TV.
Before the latest update (21.4.1) I was able to select 4k 60hz in 10 bit 4.2.2.
After the recent update, I'm unable to do so. The max setting I can now get is 4k 60hz in 8bit 4.2.2.
I decided to revert back to an older driver version and that seems to have fixed the issue for now.