I have a 65" LG C9 OLED, I Purchased back in January 2020. After 3 years it developed a burn in. After looking closer, I seen 3 burn Ins. It was from the little mute Icon. When you press mute, the little mute icon comes up on the screen, and changes places while muted. All 3 places had a little round mute icon in the background. I guess I muted it too often. I ran the pixel refresher but didn’t do anything. Have you guys ever heard of this? Thanks, Michael Hill