Sorry - but is this the only way you can get a spotifuggle issue you can't resolve.
Background is that I originally set up a Spotify account using my desktop with usual email address I got an android phone and set up a new account for the premium service (i.e. I got the first 3 months free but am now being charged £9.99 a month). I now want to share that premium account for use on my desktop, but don't understand how I do it. The cookies on my desktop just revert to the 'free' account with adverts so I'm not getting the full benefit the service I've signed up to.
I just would like to add my two cents. Currently I have one problem with offline playlists on my Android phone. There's this particular playlist that I have synced to my phone (Epic Music) that I cannot open without being connected to the internet. If I'm connected, the playlist opens and I can then disconnect the internet and proceed with listening, but if I'm not, it stays always on loop "trying" to open said playlist.
It's the only one of my offline synced playlists having this behaviour.