Local Library and imported playlists

All of a sudden I've noticed that I can't add playlists to the queue in the Android app.

The app can see the tracks, but if I click on the play or shuffle icon it just spins away doing nothing.

If I try to add or replace the queue with the tracks from the playlist i get an error message.

If I click on the three dots next to.the track and select play, the track plays.

One or two playlists with very a very small number of tracks seem to work as expected, but any substantial list won't work.

Is this a known issue that's been broken in a recent app update. I have searched but can't see anything about playlists that recently.

Thanks