i have a problem similar to lots of others, but it does not seem to be exact the same problem. I mark some playlists as offline, the android app downloads, all fine. As long as I do not hear offline for a while, there is no re-download. As soon as I play songs offline, some disappear randomly, even from f.e. audiobooks I havent heared so far. Seems to happen randomly, here track 6, there track 9. The more I hear, the more he downloads later - after an 5h-session I had an re-download of around 150 songs, hours later 19 again, and so on. At all there are 400-450 tracks available offline. I have gigabytes of space available on my SD-card.
Spotify 22.214.171.1248 , premium acc
downloads always in extreme quality
Deleted all userdata, reinstalled, restarted several times, deleted all the data, re-downloaded - nothing helped. Synchronisation works fine with the PC, no other problems, I download only on android, directly by wlan.