Sound issues when coming back form background

There are a couple of issues with sound I am experiencing on iOS 7 when my game returns from the background:

1. When returning, music sometimes stutters for a second or two before proceeding with normal play. This also happened in previous iOS

2. This is the more severe issue (iOS 7 only) - sometimes when coming back from background, the sound is not playing at all. I need to send it back to background and open it again for it to be restored.

At first I suspected my code, as I used...

Sound issues when coming back form background