There are usually details at the app store but none this time round, which is disappointing after the last year of (even topline) detail. One can only assume it’s a minor finesse rather than anything major.

But the changelog does sometimes take time to appear at the Sonos website following a release, so maybe give it time and perhaps the details will be listed there tomorrow...

In this Sonos Reddit forum post you can see that it is only some as they call ‘under the hood’ fixes. No major feature release.