Our Playbase recently started having issues connecting to the Apple Music and Podcast apps (i.e. it won't). The only thing that has changed since those issues began is that we have updated the software on our router (Time Capsule). A phone call to Sonos, along with a diagnostic report, revealed some interference.
I've experience that problem before on other Sonos devices, and it's been easily fixed by switching channels. The Sonos team member's suggestion was to link it to the router with a cable, which defeats the purpose of having a Sonos system in the first place.
We would use the Sonos app to play music/podcasts, but that is not an option due to a well documented issue of tracks skipping/cutting out when the phone sleeps.