One of the big problems with watching Channel 9 games in HD is that this regularly happens....it's pretty darn annoying; I remember in one of the Origin games this year, the commentary cut out for about 10-20 minutes.
Channel 9, honestly, need to be sacked from having the TV Rights; they don't take it seriously and they have a tendency to screw up so many of the games, plus those damned long ad-breaks in non-live games, their stupid selection of which game is live for which state, etc.