One of my LCD buttons is acting strange and I hope I can explain it correctly. It's programmed as a jump-to another activity labelled TV2 (so from currently watching TV1 to watch TV2). Occasionally though when you jump back from TV2 to TV1 the display for this button is shown as smaller font and the LCD button display is faint. Anyone seen this before? All functionality is there and it has worked fine for months but recently started doing this. Click any button and the display returns to normal.