Automix - Spotify playlist and local music files

Wondering if I am doing something wrong. On both decks I select songs from the same Spotify playlist. I then start Auto-mix. After deck 1 finishes, deck 2 starts and deck 1 loads a local file instead of a song from the selected playlist.

Am I doing it wrong or is this an app fault?

You have to add all the songs from the Spotify playlist to the djay pro queue, then automix will load the songs from the queue only.