It hasn't happened often since I got my 7 plus, 3 or 4 times at the most, but sometimes when I open an application the springboard crashes, has the black screen with the spinning circle for a couple seconds, and then I'm back at my lock screen. Is this normal? All my apps and the OS are up to date, so I'm not sure why this happens. I just wanna make sure it's normal and maybe an issue that will be fixed in iOS 10.1