I'm not sure if this is intentional but for at least 1-2 seconds after the reload animation finishes, my sniper refuses to shoot. This has lead to many frustrating moments in the crucible when my gun doesn't shoot. This has been a problem on both PS4 and PC, and I haven't seen anything else on this subject so if it has been addressed before I apologise.
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It’s intentional. You can skip most of the animation if you sprint at the right time, the timeout is supposed to help against that.