Watching a film on my note 9 and all of a sudden the brightness dimmed and this little clock appeared in the bottom right hand corner, ticking away. I turned the screen off and back on and it disappeared. Had the phone for nearly 3 years and never seen it before.
Just checked and screensaver is off so it wasn't that, I come put the film i was watching and was still there, didnt go until I shut the phone off an back on again. Weird