I think I know what you are talking about Do you mean that when you watch a program, sometimes, at random, the screen goes blank for a while (maybe a second or two) but then returns to normal and its annoying? If so I have witnessed this myself
yea thats what happens on iplayer or itv hub. netflix is worse tho, often not returning to normal at all, only way out is press back button and try again. most often need complete reboot to fix for a few hours.