Campaign CO-OP Question

I’m sorry to be that guy but I was just curious, is anyone else still experiencing input lag / general lag when doing any of the co-op campaign missions? Me and my friend both have good internet, we’ve reset the cache and opened both our nats to open but still nothing. It’ll usually be fine for a good 20 minutes but then the player who isn’t hosting will have game breaking lag. I’m only asking just so I can know if other people still have this problem, or if it’s just us. Thank you. [: