I've read all of the help files and discussion posts with similar problems. Spotify offline playlists randomly disappear, whether I've logged in for 30 days or not, and it's starting to really piss me off. This is why I pay $10 a month, yet I hop in my car, fire up Spotify and the playlists are gone. Since I live in a dead space for about 10 miles this means no music, no benefit to the monthly fee.
Today this happened. All three downloaded playlists have disappeared from my phone, and from June 2-4 I was logged into the app and Spotify while on a business trip.
I know I'll get nothing but flame and/or apologies, but I wonder will this ever be fixed such that I can feel confident in my monthly subscription fee.