Phone keeps flashing white on the bottom left corner of the screen

[Android Central Question]

I bought a moto e5 plus last week from MetroPCS, Occasionally, a flash of black or white (depending on the color of the screen) occurs. Is it a hardware problem?

 

[B. Diddy]

Welcome to Android Central! Is it an icon, or just a square shape? It'd be helpful to see a video of it actually happening. You'd have to post that video to YouTube or some other video site, then share the link here.