Hi.  I am looking to fix something going on with my setup.

I have a PC attached to a TV attached to the Sonos.

When I click on Living Room and group everything else (Some One’s and a 5 in individual groups)
They will all group together and everything works great.

The problem is when I, say, pause a video or stop playing audio on the Sonos.  I’m not sure how long but after a while the grouping will stop.   When this happens what it looks like in the Sonos app is instead of everything in one group with dark shading on it what you see is Living Room with no dark shading over it and then everything else grouped with the dark shading.  

I have to click on Living Room and group again to get it back to working.

How can I fix this? Thanks!