So i've actually had a couple of song disappear for me. One of them actually being a Rock Band 4 main song. This is so confusing, I've gone into the manage game on Xbox One, downloaded all, just to make sure there was nothing else to be downloaded. Says everything is fully downloaded, nothing else to be loaded. However, "I am Electric" and my "Sum 41" songs are all a sudden gone....Anyone know a quick fix?