Sometimes when i just stand completely still, and i scope in on the enemies head and tap once, the bullet hit a pixel behind him and doesnt register, why does this happen, the enemy is standing still too

I love Playing cypher. been playing him for a long time and my biggest complain about his kits is his tripwires. It is absurd how disrespected it is, now with the introduction of Fade it's barely useful, few days ago I played a game and the...