Hi, I've been searching the existing posts but I'm not feeling like I've found answers. I recently purchased a Roku Ultra (4670 series) and I noticed what looks like horizontal and vertical tearing when the picture on the screen is moving faster, like panning a scene. I also purchased 2 different brands of uhd hdmi's, my tv is uhd, and I have it plugged into the Ethernet connection which is currently running at 72 Mbps. What could be happening? How do I fix it? Can it be fixed? Please and thank you for any help given. I'm not super techy, so whatever help you can give, try to put it simply. Thank you again.