While music is playing on my iPhone 4S (version 5.1.1) a number of problems occur. Siri will randomly come on as if I have hit the home button twice, pausing the music (once I hit the home button to turn Siri off the music plays again). The music will also randomly pause and fast forward itself. All of these things occur whether the phone in locked or unlocked. I have tried turning off shake to shuffle, raise to speak (for Siri) and I've even tried turning Siri off all together (which simply resulted in Voice Command coming on instead). I went to the Apple store for help and was told to do a backup and then restore the phone to factory settings. After I did that the issue persisted but with less frequency at first, but now it happens pretty constantly again. It seems like a software issue but the restore did not work so I'm not sure. Any thoughts?