Hello all. I started playing a few days ago and after the first couple missions I did I decided to do the next one on the hard difficulty. So I started playing it and everything was fine but then about half way through it started to lag bad. Everyone would stand still except me. I couldn't shoot or take cover. Then everything would go back to normal and I'd be dead because there would be like 3 guys on top of me. I did this 3 times while checking my connection status and making sure everything was OK. I finally got fed up with it and put it back on normal. Didn't have a problem after that. Tried hard again today and the same thing happened. Has anyone else had this problem? Any advice?