Thanks for using the Answers Forum! when the audio and video are not in sync, it could be a few different things. This article should explain some troubleshooting that you can do to fix the issue:
Hope this helps,
The Slingbox Moderation Team
I have a major problem with this on the slingplayer app on the WD TV box.
When watching on the same network and using a PC or even my Android phone, the audio is always syncronized, even after a network pause.
But my WD TV slingplayer app will almost always get the audio out of sync with the video after a network pause.
I even purchased a newer WD TV box to see if it was fixed with the newest version of the WD TV hardware, but it wasn't. so I returned the newer WD TV player.
I have plenty of bandwidth both at my home and at the remote site (my boat) where the WD TV is located. This is also demonstrated by a PC based slingplayer app not having any problems with audio staying in sync after an internet pause.
It sure is frustrating and is giving the Slingplayer a bad name. I wonder if a different brand of 'smart tv' box that includes the slingplayer app would have this same problem?