There has been a slight change to the coding for the streaming off of iOS devices with iOS 9.2 and Sonos version 6.2. We have the full details on iOS streaming requirements listed
here. But most relevant for you:
Podcasts will not show up or play from your iOS device to Sonos unless you have audio tracks on your iOS device as well.
You'll just need to download any non-DRM protected music file to your mobile devices and you'll be able to see all those podcasts again. There were some changes to the way the Xcode reading was done and it isn't registering podcasts as the right sort of media file to flag the "This iPhone". We're well aware of it and are looking into if this can be resolved cleaner, but for the moment having a track downloaded to the phone should fix it for you.
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