Wall hacks, ugh!

I guess wall hacks are a real thing too in this game now. I'm sitting here playing a match in "Mixtape". I'm completely going around the enemy or should I say trying to flank the enemy from a different direction that the rest of the team. 

Low and behold, they knew exactly where I was coming from even though their focus should have been in front of them. This has happened more than once by the way!