I have a downloaded playlist that i often listen to at work...where there is no wifi. Spotify seemed to have updated a day or two ago and now is using a ton of data. Background data is restricted, so thats not the issue. Today alone I used 90mb of data and all i did was play  music from a playlist that I have downloaded to my phone. I double checked to make sure the playlist is actually downloaded and it is.

I tried just opening and closing the app a few times, without browsing or playing any music and it used 2-5mb of data every time i opened it. This doesn't seem to make sense.

Any ideas as to why its suddenly using an insane amount of data? Any body else have this issue?