One thing to try is to unplug the Sonos devices, reboot the router, and then plug back each device. Another thing to try is deleting the app and then reinstalling it. Others have experienced the same problem so you could google search the forums for more ideas. 

I understand your frustration and how this suggestion may feel.

For what it is worth, this is a community forum, there is no representation from Sonos Support. Occasionally, when they have time, the forum moderators will jump in, but right now, given the volume of posts, I suspect that is unlikely.

If you want support from Sonos, you should call Sonos Support directly to discuss it.

Thanks everyone.

I found out you have to delete app and reinstall per network for this to work when you have 2 network/location/system.

i.e. 
 

1. when in office, delete app and reinstall and log in, then system can be found.
2. when home, delete app and reinstall and log in, then system can be found.
   
   Dumb and lousy App update!!!!