Anyone have this problem?

Hello all.....I just recently purchased a new McIntosh MX 123. Looks and sounds great. I am having an issue though. While watching tv through the processor, when I change channels it drops the audio. I have to switch inputs and then switch back to get the audio back. This cannot be normal, or perhaps McIntosh assumed it would not be used to channel surf. Any experience or comments? 
    Regards,
            Steven