Playing playlist on only plays one playlist song then starts playing other non-playlist music

[NoNai]

E.g. I just clicked on the "Deep Focus" playlist and it started playing a track from that playlist.  I pressed next on the OS's music control and Spotify started playing a track from an album I was listening to previously, at this point if I keep advancing the track Spotify keeps playing music from the same album, nothing more from the playlist.

This is the third day in a row (since I recently started testing using Spotify as my music service) where I've seen this same behavior.

Windows Phone 8.1, Spotify app version 4.0.5385.29845

[Peter__]

Do those tracks show up if you view the play queue?

[NoNai]

Yes they do.  Now that I know where/what the play queue is, do you know how might be able to quickly clear it?  I can long-select and choose "Delete" on individual tracks to remove from the play queue but at this point the queue has filled considerably and it would take me a while to do that for each track.  I believe I got into this situation as I mistook the "queue" button in the app menu (see 2nd attachment) as "queue to download*" and since there's no UI confirmation of anything having been queued I ended up pressing it several times on different albums. 😃

*Speaking of downloads, is there UI that shows me just the albums I've downloaded?  Once I put Spotify into offline mode, all the features ("Search & Browse", "Discover", "Radio", "Playlists") switch to "<feature> is not available offline"

[NoNai]

This appears to be a bug with the Windows Phone client of Spotify.  Since all the tracks in my play queue are streaming songs I wanted to see what happens when I put the client into offline mode.

I downloaded a 5-track playlist to my phone (turned on "Available offline" for the playlist).  I then put the Spotify client in offline mode via settings.  When I play the downloaded playlist track 1 starts to play.  But if I try to advance forward a track I hear a click in the phone's speaker and then track 1 plays again instead of advancing to track 2.