How does shuffle work for multiple playlists in the queue?

[Eric228]

If I have four different Playlists in Queue, and I am using Shuffle, does Spotify Shuffle among all songs from all four playlists, or just within each queued Playlist?

Playlist 1: A, B, C, D
Playlist 2: E, F, G
Playlist 3: H, I, A, J, M, Q
Playlist 4: K, L, G, M, N, O, D, X

Will all 21 tracks be shuffled, or 17, since some are duplicates across Playlists? Or, will only A-D shuffle, then E-G, etc?

[jasmine8123]

shuffle won't work if you're playing tracks in queue