OnSerializeNetworkView with multiple clients, doesn't work when syncing a float?

I'm using network views to communicate between multiple clients and a server, and I've come across an issue.

The problem is that OnSerializeNetworkView only receives a value when sending from one client and receiving it on the server, other clients don't receive the value, when sending a Float. However if I change the OnSerializeNetworkView to send a Vector3, every client and the server receives updates from everyone else.

I'm using Network.Instantiate to instantiate a prefab, containing this script below and a networkView, that has the script as Observed and I've tested both using Reliable and Unreliable.

I'm not really sure what the problem is, but I've found a few others asking about problems like mine, and I'm wondering if anyone has any idea how to fix it.

I've boiled it down to this code snippet right here:

 // Update is called once per frame
     void Update () 
     {
         if (networkView.isMine)
         {
             Value += Time.deltaTime;
             transform.position = new Vector3(Mathf.Sin(Value), transform.position.y, transform.position.z);
         }
     }
 
     void OnSerializeNetworkView(BitStream stream, NetworkMessageInfo info)
     {
         //float data = 0f;
         Vector3 data = Vector3.zero;
         if (stream.isWriting)
         {            
             //data = Value;
             data = transform.position;
             stream.Serialize(ref data);
         }
         else
         {
             if (networkView.isMine == false)
             {
                 stream.Serialize(ref data);
 
                 //transform.position = new Vector3(Mathf.Sin(data), Mathf.Cos(data), 0);
                 transform.position = data;
             }
         }
     }

This example works when I use the current code, but when I use the code in the //comments then it doesn't work.