Just put 11.2 on my ATV 4K and LG 55C7P last night. Many times while watching the HBO app the screen would go blank and then show static and then flash to back. When I turned off the ATV and back on everything was fine. This was using an Amazon Basics 4K HDMI. I had my setting to auto framerate and auto hdr. Does it sound like the cable? I thought I had read about this problem but couldn't find the post. Thanks!