Synvar not syncing when Instantiating gameObject

Question

I am instantiating a gameObject server-side using the code below. The problem I am facing is that the SyncVar "PlayerUnit" is null on the client, even though I referenced a networked gameObject. Anyone knows what the problem is and how to solve it? Thanks for any help!

[SyncVar]
public GameObject PlayerUnit;

public GameObject PlayerUnitPrefab; 

void SpawnUnit()
        {
            print("Spawning Player Unit");
            GameObject newPlayerUnit = Instantiate(PlayerUnitPrefab);
            NetworkServer.Spawn(newPlayerUnit);
            PlayerUnit = newPlayerUnit;
        }

Answer 1

I found a workaround using netIds. I think the problem was that when I tried to sync the gameobject, it wasn't spawned yet on the client, so it was null.

[SyncVar]
uint PlayerUnitNetworkID;
GameObject playerUnit;
public GameObject PlayerUnit
{
    get
    {
        if (playerUnit == null)
        {
            if (PlayerUnitNetworkID == 0) 
            { 
                return null; 
            }
            playerUnit = NetworkIdentity.spawned[PlayerUnitNetworkID].gameObject;
        }
        return playerUnit;
    }
}

void SpawnUnit()
{
    print("Spawning Player Unit");
    GameObject newPlayerUnit = Instantiate(PlayerUnitPrefab);
    NetworkServer.Spawn(newPlayerUnit);
    playerUnit = newPlayerUnit;
    PlayerUnitNetworkID = newPlayerUnit.GetComponent<NetworkIdentity>().netId;
}