I can't see my squadmate's ping marks ingame. My opacity for ping is all 100.

Been something I run into with randoms and with friends in person- Ping on their screen, ping not on my screen, sometimes I hear them say they're pinging something.

This seems to happen randomly.

I too have experienced this playing with friends.

I can see markers of some friends but others I cant see. It also turns out that the friends that I cant see the ping marker for, they cant see mine either.

But it doesnt occur all the time so hard to pinpoint what triggers this.

My friends and I also regularly run into this issue. Though it is not, from what I have been able to determime, 100% of the time. Nor does it seem to be predictable. But the amount of times my squadmate or I have been killed because one of us pinged somewhere as a warning, but never saw it, is growing rapidly. 

Same here. My friends and I can't find a common denominator or pattern. It seems to happen randomly for random squad mates.

Facing same issue for quite some time now

I thought it was DICE on me joking. Like I hear ping sounds, but they are nowhere to be found. Well, in the game they do not stand out in any way and often merge from the backgrounds altogether (even at 100 opacity).