Playlists containing online music disappear when not connected to the online store

[nicolas]

I had saved a playlist with music from Magnatune only, but it isn't shown now, for the simple reason that Listen is not connected to Magnatune.
However, connecting to Magnatune or Jamendo is only download and read the song list. I think this is needed to browse through the catalog, but not to listen to this music. The playlist should save the location of the song file, in order to avoid to connect again to the music store, and shouldn't vanish. Exactly like if the songs were on your computer.