[2020] Weapon not firing

Its not happening a lot but at least 2-3 every game session I will aim and hold down button to fire and nothing will happen. I am 100% certain the ammo is full and gun is loaded every time. Like I said it doesnt happen a lot but it always happens at the worst possible time and Its gotten me killed multiple time during heroic missions making me have to start over. Ive only noticed it while using sub machine guns. Thanks