Assassination bug/glitch/whatever

Dominion on Exile.

I’m entering Charlie solo for the cap and I know that there’s a least one enemy in there because I saw his blip on the motion sensor before he saw mine and crouched. So I’m entering from the large clearing side, crouched the entire way, and turn to look up the ramp to my right as I enter.

Enemy comes out of nowhere and starts the assassination animation. Halfway through, he just… lets go. We both have no idea what’s going on, but I manage to turn around and blow him away with my UNSC shotgun.

WTF just happened?

This game happened.

I encounter atleast to aborted melees a day. That is where the melee animation starts, stops halfway before hitting the target or reaching its conclusion, and my gun returns to its normal place while I am left standing with my thumb in my -Yoink-.