Scenario : drag'n'drop album folder on app window. in Vox 2.1.1 a playlist drops down, showing the tracks. So far, so good.
But then clicking the PLAY button does not start playing the 1st - highlighted - track from that playlist.
Instead it opens an 'Add Files to Playlist' window ! I could only start playback by double-clicking the highlighted 1st track in the playlist.
Subsequent clicking of the PLAY button then alternates between PLAY and STOP, as expected.