Polk Magifi Max volume adjustment

Properly I was posting my question in a wrong place so I repost it here again. Apologise.

Just come up with a strange situation. I set up my current Polk Magifi Max with my new Sony TV. It works properly for a night but not for the following day. After hours of trials, the sound bar works but when I try to adjust the volume, the sound bar reacts with no sound but not turn off. If I turn it off and turn it on again, it works again. The strange point is even when I use my TV remote controller, the sound bar also reacts with no sound immediately. Has anyone come across with similar situation? Appreciate all your thought and advice. Thanks.