Having problem with synchronize player's nickname

I tried to synchronize players(NetworkObject) nickname by using

[Networked(OnChanged = nameof(OnNickNameChanged))]

[Capacity(20)]

public NetworkString<_32> NetNickName { get; set; }

and OnNickNameChangedStatic is

public static void OnNickNameChanged(Changed<ExamplePlayer> changed)

{

    changed.Behaviour.Synchronize();

}

Synchronize is

public void Synchronize()

{

var nick = "";

NetNickName.Get(ref nick);

textMeshPro.text = nick;

}

anyway this is my nickname synchronize code

if I change NetNickName in host it work

but if I change NetNickName in client it doesn't work

if i use changed.loadNew() and changed.loadOld to know what happend

if I change NetNickName in host

old data is empty and new data is nickname what I set

I change NetNickName in client

first old data is empty and new data is nick name what I set

but suddenly after it show message again old data is nick name what i set and new data is empty data

if I run 2 game host, client and change host's nickname in host game it synchronized both in host and client

but when I change client's nickname in client game it show 2 message that I said before and in host game nothing happen

I want to know why change NetworkStirng work in host work and in client doesn't work

ps. host and client both has it's player's(NetworkObject) Input Authority