Sonos S1 wont play NTS Radio intermittently

Attempting to play NTS Radio 1 or 2 on the Sonos S1 app only works intermittently. When selecting play, the stop button appears briefly and reverts back.
 

This occurs on all Sonos speakers at home, also after rebooting and re-adding NTS. Trying again after waiting time sometimes works, but there is no pattern. I contacted Sonos Support who are aware of the issue with no timeline. Has anyone else experienced this or has a solution to share?

I recommend reporting this to Sonos Support so they are aware of the number of users this impacts and might prioritise a fix