I had to delete the siriusxm canada service, and tell sonos to link to sonos again, it took me to the us sonos site, where it linked.  logged on though with my siriusxm canada username and login, and it worked.  now it appears to be linked to Siriusxm US site but with my siriusxm Canada credentials.  I had to replace all my siriusxm favorites, as now they have to point to the us site and not the canada site.  Go figure.  If I remember correctly this is how I had to set it up a few years ago, then It broke after an update, and I had to change the service to siriusxm canada, now after the latest update it has reverted, it seems.  Very confusing.  

Being a little snarky, I bet it works just fine on the Sonos2 app / system. 

Yes, my Sonos 2 app system still works fine, but the components tied to my Sonos 1 app went off the air, so you 

are probably right.