Im having a weird issue with my synced music on my 64Gb 4S. Alot of my music wont play. It's there, and when I tap on a track to play it, the play icon shows at the top, the play button changes to a pause button as usual but nothing plays. The timeline doesn't move. I've only been able to play a few albums out of the many that take up the 64GB. On a few albums, I'll tap the first track and it'll skip down a couple tracks and not play. It's a really weird issue. I upgraded from the 4 and never had any issues playing music. Anyone else having this issue? My next step is to reformat and start over but I wanted to see if anyone was having the same issues before I did.