iPhone 11 screen goes dim
Love the new iPhone 11 running iOS 13.1. However, after opening an app the screen will quickly go dim after only a few seconds if the phone is not moving (for example, resting in a stand on my desk). I have to touch the screen for it to wake up. This didn't happen last week with iOS 12 and my old 8+. Is there a setting I'm missing (this isn't dark mode) or a bug in iOS 13.1?
iPhone 11