That has happened to me a couple times recently. I had to connect to a public wifi while I was away from home for work. The cause was my lease through the access portal would expire. Any active connections would remain open (connection to physics host), but any new connections would be refused. I had to disconnect then re-connect to the wifi to resolve this problem. I’d guess the cause for you is also network related.

Ok you have a good case here for sure. There were 2 players taking no damage at all. Monte Carlo is not a good weapon, but no damage to golden gun in the face. NO that's not possible. Also there are no damage numbers showing when you are peppering them with MC. I see this a lot in PVP modes. They are obviously cheating. When I see this I'm out straight away (Sorry to the team I am on), but not worth going on with it. Secondly: Have a look at their name tags. Notice they have numbers and glyphs with them? They're obviously testing cheats before they sell them. No point selling cheats if they don't work. Reporting these scumbags will do nothing. It's a burner account and they will just start another. The one with the nametag of just 'K'. I have seen this dude playing in IB and Control. I was wondering how this guy was taking no damage and I am glad you caught him out on video. If I see an account with just random numbers or glyphs or both. I am suspect straight away. I saw a guy the other day with 30+ flawless and a KD of 5.0+. Yeah he was another cheater. It will never end.

That's some laggy gameplay (notice how your team mate, after your first death, simply disappears from the screen).

I've run into this a few times. Frustrating AF.

Meanwhile, you can be one shot by a player who isn't even aiming at you.

Bungle still maintains that Peer to Peer Networking is just fine. We all know that's nonsense as your Video shows. "He/She that lags the most becomes the Crucible King/Queen". It's especially obvious when the population is dropping and they are forced to matchmake you with anyone else in the world and regardless of how poor their connection is.

Not a bug, thats lag.