Homepod mini won't play radio stations anymore
I'm based in the UK and I have three HomePod minis, all running the latest software (15.6). I mainly use them to listen to the radio, for example I say "Hey Siri, play Radio X", and Siri responds "Now playing Radio X on Tunein" and starts playing that station. This has worked without problems for a couple of years. In the last few weeks, and since the HomePods updated to v15.6, when I request a radio station now e.g. "Hey Siri, play Radio X", I now get the reply "I cannot find Radio X (or other requested stations) in your Apple music library.
I have tried resetting the HomePods and deleting and adding again through the home app but it makes no difference. I can manually play the radio stations by playing them on my iPhone and connecting to the HomePods, but that defeats the object of having a voice activated smart speaker. Any suggestions?