Just successfully added two ERA 300s to my bedroom which had an ARC associated with a new Samsung TV and new Apple TV. Everything began marvelously.
The rest of my home has wired and wireless Sonos products that are all compatible with Sonos 2.
Then on playback of iTunes or Amazon selections I get skipping and “song is not encoded correctly” errors.
Playback of Tunein radio stations is not interrupted on any of my Sonos devices.
My WiFi coverage is excellent but I did try rebooting the router and the Boost. Still getting the same error messages.