The invisible walls and boundaries are annoying!

When you get to the edge of a map, you just get stuck running. There isn't any indication that you're at the end. I suppose people will get used to boundaries in the end. But for now, I get killed a lot trying to take cover in a boundary.

Also, has anyone noticed that you stop randomly while you're running, like there is a wall there? I think if you jump, you get to keep going. I'm sure it's a bug in the game, not just me, right?