My iPhone 6 (iOS 8.3) screen does not go to sleep
Whenever I receive a text or email my phone lights up to alert me but it doesn't go back to sleep until I manually hit the right side button. Typically, the screen would light up and then go to sleep after about 10 seconds now nothing. My auto-lock setting it set to 1 minute but the screen stays on way past that. However, it used to only take about 10 seconds for the screen to go back to sleep.
iPhone 6, iOS 8.3