I was playing today to kill some time and I joined an only sniper map, which I don't normally play if I play at all. I noticed after a few rounds this guy was hiding behind the wall. He could see me but I could not see him. I don't know if this is a bug or something that was deliberately implemented by the map publisher. Either way its extremely obnoxious and makes the game in a way unfair for those that don't abuse it. Video: https://youtu.be/SPZOpSnrUfs
It was great playing with you today on Skygates Castiel. Welcome back!! By the way, this hiding behind wall issue is in other maps as well i.e. you can barely see an elbow or knee whereas the other player has full sight. But still I like the game and the map.