typically, I am in E mode (Which ever that one is...) and zoomed in, and the nme ship is on fire, so it's the fire or the smoke.
I have noticed that when your gun's go off, the plume of smoke will show the crosshair, or when you land hit's on the target, the crosshair show's up, but it's clear.
So it's prob. still there, but we are loosing the Red color.