Flickering back line, bottom of screen, LG TV.

App is installed ON TV, is up to date. Most Apple TV+ stuff is OK, (See, the last thing he told me, servant, for all mankind, etc...). All Netflix, Prime, BBC, Britbox, etc... is also OK.

BUT occasional stuff gets flickering black bar at the bottom of the screen, most recently ghosted.. trying to watch now, but it's giving me a headache.

I've tried all the troubleshooting steps, uninstalling, reinstalling, changing to SD playback only etc.... Still flickers on pause.

What is going ON!!???