You’re grouping them? The PLAYBAR has no Bluetooth capability. There will be a slight delay of around 75ms when doing so. 

If so, there might be some sort of wifi interference , as the line in from the TV is significantly more substantial in bandwidth than a normal music stream. As such, it might be significantly more influenced by interference. 

Thank you for the response. I love the Sonos family.  Just adding more items and learning