Solved
BF1 has been hacked.
The anti-cheat doesn't help. Hackers are using software that allows them to kick players from the server. The hacker is in spectator mode so his nickname isn't visible. I don't have internet problems. The same thing happens with my friends when we're on the same server.
Hello zorrrrrrrrro,
The only thing you can do is to report suspected hackers.
