i don't think it's an issue from the game.
Yesterday, i've played a little Black Ops 3 after the update and my nat was opened.
So are you using custom port forwarding or just UPnP on the duma?
Starting to lose my mind with this game. Keep getting thrown into games where ping is jumping over 100ms ping assist is at 35ms get hit markers then die can not figure it out at all seem like I run a lot slower then everyone els in the game too any help please :s
Ping assist only gets hosts outside your radius that are under the ping limit. You can still get games within your radius that are over that limit.
Make sure all devices are connected to the duma. 70/70 anti-flood, console in hyper traffic. ~1000km radius, strict on, PA 0 and see how you go.