This monitor and amd vega combo has been great since I got it beginning of October, up until recently I am having this major issue.
My rx vega 56 has the latest drivers and or latest firmware (1012.0) for the samsung c27hg70. When I watch a full screen video, then go back to standard size. My entire screen turns colorful like a 70's tie dye shirt color, but on acid. If I have a game open then I can alt-tab back in to the game and the display goes back to normal with normal colors. I currently use display port and freesync with ultimate engine. Can you please help or send this to the appropriate team as this is an insanely huge pain. To fix I either have to reboot and alt-tab in to a game. It happens only when full screening like youtube or other video content then going back to normal size.
I don't have a picture now as I'm at work but I'll try to get one.