While watching a few videos on YouTube or Netflix, Prime Video etc my remote back button and direction circle stops working but the home button, volume, on/off buttons work.  I've repaired it to the tv (S90C)  but still happens, charge is also 100% on remote.  It's getting on my nerves as I have to press home and exit the app then when on home screen all buttons are working again, then I can go back on apps and then it does the same thing, I try to use wheel to select new video or exit the current one but the buttons don't do anything.