Happens in my car using Carplay but I've also just checked and it fails on wifi connection too.
IOS 12.1 and Spotify version 8.4.786.643
My Question or Issue
Just recently I find that each new song only plays for around 10 seconds before stopping. The status bar shows the song is still playing. I can forward to the next song and that starts okay but again will stop after around 10s This happens but using Carplay and now it also stops working from my home or office WiFi connection. I've deinstalled and re installed without fixing it.