Greetings, I noticed that when I put my phone face down on a surface the screen takes about 30 seconds to turn off. When I am in a call and put the phone to my face it the screen goes black immediately so the sensor is working in that aspect. If I'm not in a call, turn the screen off and lay it face down, the screen turns on and stays on for the aforementioned 30 seconds then shuts off. My wife's phone displays none of these issues. Has anyone else experienced this issue? ***sorry so long winded