There is an iPad video huge sync slipping (~50%) problem from Server over an otherwise idle LAN, for both real-time OTA TV from my HDHomeRun tuner and from previously recorded shows. The iPad app is the only client.
So, within a minute, the video is at least 30 seconds behind the audio; in two minutes, the video is at least a minute behind the audio.
This occurs 100% of the time.
The audio always seems fine.