Web app controller: Pinned collection no longer available
I’m persevering with the new web app controller but this has now appeared on the home screen:

A whole list of BBC Sounds shows, labelled as “Pinned collection” with the error message underneath each one: “No longer available. Go to the Sonos app on your mobile device to remove”.
I have no idea how to get rid of these.
They do not appear under any favourites list on my mobile app. They do not appear as saved shows in the BBC Sounds Service when accessed via either the desktop controller or the mobile app. (They are shows that I have listened to via BBC Sounds in the past but they aren’t on any “pinned collection” that I can find).
Does anyone have any idea how to get rid of these?
Many thanks.
Moderator edit: changed “Windows” to “web app” as screenshots show web app, not Windows Desktop controller.
