I have top of the line LG OLED 4k TV. When I select multiview or a 4K channel (147) . I get a black screen with little rotating dots and a message that says "invalid format". If I cycle TV power a few times it will sometimes work. The dish people replaced my hopper3 and all the switch stuff on my roof with the same results. The tech pointed out that the invalid format is an LG message not a Dish message so it must be a problem with LG. Has anyone seen this problem and is there a fix? LG has offered no help.