You should also add that all OLED TV's have an embedded "screen saver" that cannot be turned off. It is there to prevent image retention or "burn-in" but that prevention method interferes with a lot of apps, especially Plex.
Whenever I use Plex to play music from my central media server either via Fire TV or directly in the LG WebOS software, it will time-out after about 20-30 minutes, When that happens, it disconnects Plex from it's source (my central NAS) and creates an error that can only be corrected by rebooting the device.
It does not happen on regular LED TV's which makes sense since they are not susceptible to image retention or burn-in. Usually the remedy is to make sure the image on the screen changes or refreshes after a period of time and with Plex music, that happens about every 3-5 minutes when the song finishes playing and the next one loads. So I really don't understand why LG keeps this onerous screen saver in place. Please remove it or allow the use or the Plex app to disable it.