I have an OLED55B6P TV. When I select Dish network multiview or 4K channel I get a black screen with a message "invalid format". Dish replaced everything (hopper3, switch, etc). If I cycle TV power it sometimes works. Other times I have to reboot my dish receiver to get it out of the multiview or 4K mode. Settings>about this TV> says I have the latest software updates. Has anyone seen this problem? LG customer support has not responded to my inquiries.