This was found by accident, but I believe that a few players can get stuck if they don't find the "climb-over" icon, which is hard to activate.
I found this specific point in the map "Crossing" playing in the Insurgent side. So there is an opening on the right wall in the first picture where an Insurgent can crouch through. When being shot, I ran foward to my right side and fell into this weirdly placed dip. It took me a couple of minutes to get the sense that I'm in a glitched area or in an unplanned dip. There is a way to get out, and it's to aim yourself looking at the sandbags and just climb out by vaulting, but I really think that this dip should be editted out.