Anything from the pillar on the supply ship to a rock in the fields near skull town. Bullets of all types just seem to penetrate all of it. Then to see a havoc shot hit the wall and still damage me, what is this? "Wanted"?
Could be latency/lag issues. On your screen you're behind a wall on thiers you're still in the open and thier shots are hitting you.
Net code in Apex favours the shooter, not the target, and synchronization deviation between clients has been demonstrated to be in the range of 500-1000 ms.
Give me Quake 3 net code *any* day of the week; far lower pings, coherent & skill based. (Relying upon the shooter to compensate for their known latency)