Since I have jumped to iOS 9 (from 8.4.1 to 9.2.1), there seems to be something wrong with my iPhone 5s. If I update apps, they are no longer in correct order on my home screen. Furthermore e.g. the Youtube-app-symbol is shown twice. After restarting the phone everything is alright again. The apps are reordered correctly. What is wrong? How can I fix it? Has anybody noticed this glitch too? Thanks for your help!