Explain the assassination glitch to me please

Mind you that i live in the fiction forum and do not come here

I will assume that you will know what i am suffering to, the glitch in which if you are assassinating somebody they can “get out of it” and then have a chance to kill you.

It happened to me twice and i was not aware of this glitch and it nearly got me killed. Can somebody explain the mechanics/reasoning behind it and do you know if 343i is going to fix it?

Thank you.

Maybe an instant lag ? Maybe a host change.
When the host changes and someone tries to kill me, I can sometimes kill him during the assassination.