Best answer by Keith N
Interesting to note: This topic started as an iOS problem with streaming. Recently this topic has changed to be focused on Google Play Music. As such, to avoid any confusion for other users, if you are having trouble with Google Play (or anything other than the originally posted problem) I'd encourage you to create a new topic. This will keep issues separate and help us (the Community) help you. For more information about the iPhone/iOS streaming on Sonos, check out this article for more information.
We are currently investigating issues with audio playback from an iPhone or iPad to Sonos when using the “From this iPhone or iPad” music source.
If you use other apps that use the iOS device audio, such as making a phone call, YouTube, social media apps, or use Bluetooth headphones while playing from “This iPhone or iPad,” you may experience audio interruptions on Sonos until you completely close or quit those apps. Until this issue is resolved, we also recommend disabling Bluetooth for the best experience.
Additionally, if there are any AirPlay devices on your network, such as an Apple TV or Airport Express, audio from “This iPhone or iPad” may stop abruptly until AirPlay is disabled on those devices.
We recognize this isn't an ideal solution for those who use AirPlay regularly at home, but if you prefer to continue playing to Sonos from “This iPhone or iPad” without interruption, refer to the device manufacturer’s instructions for disabling AirPlay. Once AirPlay is disabled, close and re-open the Sonos app and start playback again.
Thanks! View original