This bug needs a lot of attention. You can't shoot at people on the ground, by trees, by buildings.... I've hit invisible walls in the most random places. It appears a blade of grass is a barrier at times.

I've been standing up, shooting downhill along a trench and hit some type of wall. This makes good terrain, ambushing, etc... pretty useless.

I sincerely hope this is being treated as a top priority. Game breaking bug in my opinion.