When you shoot over a long distance in prone position the bullet trajectory seems a bit bugged if you're not laying down on a horizontal flat surface. It's making it almost impossible to hit a target at range that way.

Take a look at the video I made:

The first shot fired in crouched position is very accurate, the bullet lands just above the electricity pole on the rocks where I aimed. The second shot I took while I was laying down lands way to the right where I didn't aim. This only happens when the surface you're laying on isn't a horizontal flat surface but on a angle.
This bug has been around for as long as I can remember but I think it's time to get it fixed.