Hompepod does not recognise music requests since 13.3 update

Since the Homepod 13.3 update my homepods no longer accepts any music requests

If I ask it to set a timer, check the weather etc, all works perfectly

But if I say for e.g Hey Sir, play songs by Madonna" it just says " just a sec" or I'm on it and then stops.

I have reset the Homepods, unpaired as stereo, set up as new etc, and it is still the same. It just cannot play anything from Apple Music, including radio stations etc. This all worked perfectly before the update. Any help?