Sometimes a glitch occurs when your attacks no longer display animations indicating hits. For example, a grenade explodes but does not show the explosion. The same goes for every other item. Also, even when you destroy crates, they will never drop items. including health/ stamina orbs. You can not even see items. To make things worst, your enemies can hit you and lower your health bar.
What is also game-breaking about this glitch is that you can't kill enemies with your primary weapon.
Customer support service by UserEcho