You still must be careful about leaving images up at full brightness. Tell more about the set.
Images from the previous channel are visible on the current channel, cable menu screen and Netflix as well. 4 year old Samsung.
I have had issues with the cable company Spectrum (awful!) so I assumed that the cable service was the issue. However, I plugged in an older Samsung TV and had no problems.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic