iPhone screen goes black when camera is covered
I have an iPhone 6S+ updated to iOS 10.2.1 and for the past couple of days I noticed that whenever the camera above the screen gets covered, the screen goes black and once it's not, the screen goes back to whatever it was on. This never happened before so I tried looking through the settings to see if it was an option to turn on or off but I couldn't find anything. Can anyone tell me what this is?