LG G4 :: Screen Pixelates Every Single Day

I've had my Tmobile G4 for almost 2 weeks now and the screen pixelates every single day. The weird thing is it only happens on the bottom left corner of the screen and the size of the pixelation varies. It happens more often when I'm watching videos or playing games. I'd take a screenshot but it's almost impossible to capture because it happens randomly and so fast that I'd have to hold the power and volume down button before it happens in order to capture it. I prefer trying to fix it than bringing it to the Tmobile store where I'd stand for 10-20 minutes waiting for it to happen so they'll believe me.