Screen Turns off randomly topic

So i had my G3 for a out 2 months so far. Love it. Recently ran into this bug. My screen auto turns off when I'm using the phone. Video, browsing, texting etc. It happens randomly. Even if i just unlock the phone and use it for like 10 seconds the screen will turn off on me and i gotta wake it back up. Anyone know about this? I am running 4.4.2