How to fix my screen from randomly tapping?

I replaced my own lg g3 screen after it cracked and damaged the digitizer. I bought a screen and digitzer replacement combo and proceeded to replace it according to the guide. After a month of use, the screen began to randomly tap and behave erratically. I then narrowed it down to the following, when I press the lower part of the bezel, the part that says LG, the screen begins to randomly tap around the middle of the screen and doesnt stop until i lock it. When I unlock it, I can use the phone normally but as soon as I touch that lower part of the bezel everything goes nuts.