I did a clean reinstall and am still having this issue. I agree that it seems to have started after a recent update. Please let your tech team know that there is a major bug right now that is losing you customers.
Please look at the feedback on Play Store since the latest update. There are a lot of people reporting the same problem. I am not reinstalling this app and having to download numerous tracks again because of a fault with the latest update that has been rolled out by Spotify.
Sony D6503 Android version 5.1.1 Spotify version 188.8.131.528
I have just checked the Play Store feedback just now - I think it is fair to say that more than 50% of recent feedback, i.e. since the latest update, is about the same problem. The app just stops playing after a few tracks. It seems to be quite unpredictable as to when it happens so I'm not sure how you go about reproducing this fault. Please just fix it quickly as it is clearly affecting a LOT OF PEOPLE!!!