cannot spawn a game object with client authority

Question

I have a command which exists on the player prefab which basically spawns objects on the server from the client

 [Command]
 void CmdSpawnObjectWithAuthority(GameObject spawned)
 {
     NetworkServer.SpawnWithClientAuthority(spawned , gameObject.GetComponent<NetworkIdentity>().connectionToClient);
    
     
 }

And it does spawn them, but they are spawned without client authority for some reason, although I am sure that support for client authority for non-player objects has been added since unity 5.2, I need the spawned non-player objects to have client authority as they have other commands attached to them

Thanks in advance

Edit: i am using unity 2019.2