I am starting to see an issue when engaging the enemy and not being seen or heard causes enemy reinforcements to drive up even when the enemy is not on alert and hasn't seen the body.

While engaging the enemy at roughly 500-600+ meters enemies don't die and don't show a hit animation. I experienced this multiple times once at the mine i was engaging a soldier on a .50 cal and he would not die from a Mar 10 .338 at 700 meters, and a target at blue pearl on the crane at around 800+ meters, and while engaging one of the broken down convoys at 600 yards could only kill the Ifrit driver and gunner and the one soldier at the front of the convoy everyone else was invincible and acted like their friends weren't dead, and never alerted to my position but Genderme showed up as well even without being alerted.