Player on my server copies my movements

[Justabaker]

Hello, maybe this is not the right place to ask for help, but I need help with a certain bug in my minecraft 1.16.5 server, what happens is that whenever a new user enters the server they always report that they replicate the actions of other players, For example, if a player hits, crouches or places blocks, the other player replicates those moves, but the strange thing is that it is only visual and only happens if one is close to the player because if one moves too far away to the point that the other player does not render, the aforementioned moves are correct and without any type of replication, I would like to know if this happens because of a specific mod or something related to a server configuration, I would like to know if this is because of a specific mod or something related to a server configuration.For example, if a player hits, crouches or places blocks, the other player replicates those moves, but the strange thing is that it is only visual and only happens if one is close to the player because if one moves too far away to the point that the other player does not render, the aforementioned moves are correct and without any type of replication, I would like to know if this happens because of a specific mod or something related to a server configuration, I would appreciate your help. 

 

Thanks.