Photon instantiate and addforce to arrow

I have a third person character, with a child object calle ArrowSpawn. It holds the position of where the arrow should spawn when instantiated. Currently its working fine in singleplayer, but in multiplayer it doesnt work. The arrow is spawned twice, one of the arrows disappear right away and the other falls to the ground.

This is the code i use:

         [RPC]
             public void LooseArrow(){
                 GameObject arrowclone; // the prefab of the arrow
                 arrowclone = PhotonNetwork.Instantiate (transform.GetComponent<tpAnimator>()
     .arrow.name, GetComponent<tpAnimator>().arrowPosition.transform.position, GetComponent<tpAnimator>().
 arrowPosition.transform.rotation , 0); // ArrowPosition is the gameobject holding the spawn location and rotation, its located at the right hand bone.
                 Vector3 direction = (GetComponent<CrosshairAim>().test - GetComponent<tpAnimator>().arrowPosition.transform.position).normalized; // sets the direction from spawnpoint towards crosshair.
                 arrowclone.GetComponent<Rigidbody>().AddForce (direction * 300);
             }