Apple TV after upgrade only video no sound issue.

So I had no issues with ATV until yesterday(10/25/2013) when I updated ATV with the latest update .Since then , whenever I play a video on my iphone 5S and airplay it , the video plays well on the TV but there is no audio at all . I tried changing the Dolby setting s and the Audio Output settings , but it doesn't seem to work .

Never had this issue earlier .

Only restarting Apple TV and my Router seems to solve this issue for now .

Is there any fix for this issue.