iPhone 6.I can confirm both of the above happening on my deviceCan anyone test these bugs to see if they exist on other devices -
Opening the Messages app causes the battery icon in the top right corner to change colour slightly, before changing back.
In the App Switcher if you tap a blurred out app that is to your far left it will come into view, become blurred briefly, then come back into focus. You can easily do this by scrolling as far right as you can in the app switcher, which causes the immediate app to the left become blurred