There was a fix today for some of Sven's sounds that would pop and click at the end. Much appreciated. And I suppose I should have reported this earlier, but Sniper's attack sound does the same thing for me, but it's done it since I've joined the beta. Assasinate doesn't have any clipping at the end of that attack. Shrapnel doesn't have any problems either. And I don't think it's the firing of his weapon but the sound that is produced when his main attack hits its target. The very end of the "hit sound" is what sounds odd on my end.

I'll edit this post to provide any more detail should I be able to gather any.