Instatiate does not work on the client

In this code, the client text shows in the console but the instatiate only happens on the server. Perhaps a bug?

 if(event)
 {
     if(Network.isClient)
     {
         Debug.Log("client");
     }
     deathEffect = Instantiate(deathEffectWood, rBallSettings.transform.position , Quaternion.identity);
 }