hitting ground despite being cleared up

Often, no matter if proned, crouching or standing, and having a clear view and gun area for shooting, bullets hit the surface I'm standing on.

In order to avoid this, I have to clear a much bigger area than needed. It happened as well in Bat1, but not as often as here.

I understand it could be gun physics, some of the times, but definitely not when I'm standing much above the ground.