Lag but others not

Hi! i am thund and i've been using aternos for a month, But after deleting my server then creating a new one, Then i joined the server, and so my friend also joined, But for some reason, All entities are not moving so as players, and i can't see a single message, If i say a message, it will not appear, All entities are not moving, No messages, and then i suddenly get kicked saying i timed out, but i have a very strong wifi, Can anyone explain this>