Why does the screen automatically turn on if I am nowhere near my GalaxyS5?

[AC Question]

I turned off smart stay, along with any air gestures. It gets really annoying when I am trying to do work and the phone randomly lights up next to me.

 

[CrazyCamel369#AC]

When it lights up, are you receiving any notifications? Certain apps have the permission to light up the screen. If you're not getting any notifications, is it on charge when it lights up? Because there's a setting called "Stay Awake" in developer options that causes the display to, well, stay awake.