Halo 4 flood problem!! Please help!

Dear 343,

I was playing flood as a spartan. I saw a flood zombie, i was going to shoot it with my magnum, i then shot a few shots to his head. I was wondering why it took a long time to kill the zombie because usually they have no shields. As soon as i killed it, the game said i did a BETRAYAL. I think there was a skin glitch problem, this is really annoying and you get booted for killing a player you was supposed to kill.

Guys, and readers, if you have experienced this plz reply

Hope it gets fixed.