Dear sir,
I've updated my iPhone 6 to the latest version 8.3,but ever since,whenever i try to rewind a Facebook video, the sound drops for a second then becomes normal again. This issue happens only after rewinding. I mean no problem in playing videos except if i pull the progress bar back to the beginning (rewind). I tried reset and restore to factory settings with no use. Please advise me how to fix this. Many thanks