Chosen Solution now this has happened on and off… ive had the tv replaced completely twice. Id rather throw it through the wall lol… but 5yr warranty there has to be a better solution. Samsung UN65NU6900 This happens on any hdmi port, as well as just the tv. But I can “stop it", if i change to a custom screen size. HOWEVER in doing that, i also stretch/cut off some image… So basically sometimes the edge of a video, or image, retains color from previous, or it tries to “catch up" as it’s a moving line… And to make it worse, if i watchsomething like youtube videos that have an image in the middle of screen, the edge of that image, still shows issues....