Adding a song to playlist in Windows app is a huge problem

The Windows app has a massive bug adding songs to playlists from a local library.  I have five Sonos playlists (not Spotify playlists). I store my music on the same Windows PC where I run the Sonos windows app.  Here is how you can reproduce the bug:

In the Windows app, play a song from my local library. Then click the “i” and then “Add song to Sonos playlist”.  The next screen should show the list of playlists, but most times the app does not show the list of playlists and instead shows a message “No playlists have been added to your Sonos Playlists yet”.  But I have 5 playlists, so it is wrong.  If I click “i” and then “Add song to Sonos playlist” again it will usually show the same wrong message.  One time in 10 it works, and shows my playlists.  So basically it is unusable to create a playlist in the windows app.  
Has anyone else experienced this?  I have searched in the community and did not find others with this problem (though frankly I find the search algorithm in the community seems less than effective).

Thanks.