My HR22 just started having an audio issue. When switching tuners or between recorded content and live content, there is no audio. When using the HR22 to play recorded content from a different DVR using whole home, the audio always works. Returning to live tuner, no audio. I can make the audio come back by going to audio settings, and toggling the Dolby setting, It doesn't matter what the current setting is, switching to the other setting makes the audio come back. Any ideas?