I have an LG G4 that I recently had to factory reset. Spotify worked fine before this. 

Now it will claim to download a playlist completely but it will not play it offline. The SD card has over 400 GB (Yes, four hundred) of space free. The card works fine and it was not even in my phone during the reset. Some songs have managed to save but overall nothing. 

I have tried uninstalling, reinstalling, wiping the cache, etc. It does make the download folder on the SD card and I make sure it is deleted in between installs.

Nothing seems to work. I'm really getting fed up paying for a premium service if I can only use it on my desktop. Any help would be appreciated!