Invisible sniper on splitscreen

Yesterday i was playing with my friend on splitscreen. He was playing a sniper, and when he scoped in he became invisible (with the exception of one small item, i think his scope). When he stopped scoping he became visible again.

I am not sure if this was only on my screen, or if this also was the case for other players.

This was no one time thing, it was the whole evening, in local multiplayer as well as online multiplayer.

Yeah, this happens to me too.

It's kind of funny when my friend plays sniper and I play assassin on different teams. Due to two separate glitches, he can see through my stealth just fine, and he's totally invisible to me