Best answer by Ken_Griffiths
Then again, if wiring is the best solution, I would definitely go for that. That means pulling cables again :)
Can you check this diagnose?
I don’t work for Sonos, so I cannot see your diagnostic, personally speaking, but hopefully one of Sonos Staff who use the community here may pick up your post and check it for you. You may need to wait to see if that happens. Otherwise you can formally ask them through the Sonos Twitter account and refer them to this post.
See the link below to contact Sonos, via Twitter, if that becomes necessary...
Contact Sonos Customer Care/Twitter (24/7) etc.