I was forced to upgrade recently to the new version of Spotify for my Iphone. I immediately noticed on some songs the guitar stereo track has disappeared on certain tracks. I had listened to these tracks on the previous version and all the guitars could be heard. On the new version I am noticing missing stereo fields on certain tracks and songs via bluetooth, however plays fine on any desktop computer. Running 220.127.116.114. Anyone else having this problem or know a fix?