Sometimes when using my Apple TV device with my TV off and trying to play music using the iPad Remote app, the app hangs and no music plays. When I turn on my TV to see what's going on there is a message suggesting the Apple TV is not authorized to play this content. Clearly, that is not the case and when I use the normal Apple TV remote to select the music, it plays fine. I use iTunes Match and generally stream my music from there on the Apple TV. I have both HDMI and optical connections to my receiver. Any idea why this could be happening? I would say it happens several times a week.
Apple TV (3rd generation), iOS 5.1.1, iPad Remote App