I would recommend that you submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it. Don’t post the resulting diagnostic number here, they get sensitive about GDPR.

There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.

When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

​@Jdn8cam 

What is happening when you try to Airplay YouTube Music to Sonos - talk us through what you’re doing and what you are seeing.

(Playing through the Sonos app and playing through Airplay are totally different things so it working okay through the app is not evidence the connection is okay.

When you select music on the Sonos app, the speakers ask YouTube music for the track and it reaches the speaker via WiFi. Airplaying is a direct link between the phone and the Sonos speaker.)

Hi ​@Airgetlam thanks for the advice. I’ll provide an update when I’ve had a chance to give them a call.

hi ​@Rhonny I’m not as tech savvy as I thought lol. Please refer to the photos to see what happens every time

1 - loading circle where it is attempting to connect

2 - pop up stating that it is unable to connect

For what it’s worth, every time I’ve had difficulty connecting with AirPlay 2, and it has been years now, a reboot of my iOS device was necessary. Not a reboot of my Sonos. 

Reboot as in a factory reset? Hopefully it’s not that. There’s about 4-5 devices I’d have to do it to as it’s not just my phone

Heh. No, simply a power down, then power up of both or either the iPhone or iPad, depending on what I was using. But it required a full power down / reboot of the iOS device, not just a ‘sleep’. However, as I caveated, it has been years. This was before Sonos split into S1 and S2, so many, many versions of both iOS and Sonos since then. No idea if it’s still applicable. 

Frankly, rebooting everything is a good strategy, from the iOS devices, to the router, to the Sonos devices, in order to refresh all OS/firmwares. But ultimately, contacting Sonos would hopefully show data about the AirPlay 2 connection in the Sonos software. Unfortunately, neither you nor I have access to that data.