Battlefield 4 keeps disconnecting from session

In the past half month, there have been people using DDOS and EA server backend bugs to attack players' servers. During the game battle, all players suddenly experience severe lag and crashes, or simply collapse. The connection between the game prompt and the server was lost, and the server was cleared. This situation occurs on servers around the world, especially on Locker and Metro map loop servers, which have become targets for some people.