Mutliplayer SetActive(true)

Hi, i have my multiplayer game, when i spawn my player i use the folowing line:

player.SetActive(true);

via RPC call...

until now everything goes fine. but when i have i.e 2 players, and someone spawn, the screen of the other people flashes the player for a mili second, no errors on that, but it is ugly and annoying. someone can help ?

code:

     [RPC]
         void Client_SpawnPlayer(NetworkPlayer player, Vector3 position, Quaternion rotation)
         {
             NetworkManager.GetMPPlayer(player).playerIsAlive = true;
             NetworkManager.GetMPPlayer(player).playerHealth = 100;
     
             if (player == myPlayer.playerNetwork)
             {
                 myPlayer.playerManager.player.transform.position = position;
                 myPlayer.playerManager.player.transform.rotation = rotation;
                 myPlayer.playerManager.networkView.RPC("Client_PlayerAlive", RPCMode.All);
             }
             else
             {
     
             }
         }

the line: myPlayer.playerManager.networkView.RPC("Client_PlayerAlive", RPCMode.All);

just SetActive my player GameObject.