Sometimes when I leave an app (either with the back or home button), and the home screen shows, but the icons take forever to load and I can't switch to any of the other screens. This has been happening since the last OS update. I've disabled all the apps that I have downloaded that might be running in the background sucking up the processing memory, but loading the home screen is the only thing that seems to lag at all. What might be causing this? Is there a fix?