Server calling events on destroyed objects, even after unsubscribing.

I have an event which is subscribed to by the server when Attached, and unsubscribed when destroyed(I've tried Detached as well). However, even after that object is removed from the server using BoltNetwork.Destroy(), the event is still trying to call on the destroyed object which results in a null/missing object error.

Destroy code

public override void Disconnected(BoltConnection connection)
    {
        if (!BoltNetwork.IsServer)
            return;

        //Find all objects for the leaving connection.
        List<GameObject> connectionObjects = new List<GameObject>();
        foreach (BoltEntity item in BoltNetwork.Entities)
        {
            if (item.Controller == connection)
                connectionObjects.Add(item.gameObject);
        }
        //Destroy found objects.
        for (int i = 0; i < connectionObjects.Count; i++) 
            BoltNetwork.Destroy(connectionObjects[i]);
    }

Event code

    public override void Attached()
    {
        if (BoltNetwork.IsServer)
        {
            BoltNetwork.AddGlobalEventCallback<PlayerSetActiveEvent>(OnPlayerSetActiveEvent);
            BoltNetwork.AddGlobalEventCallback<GlobalDeathEvent>(OnGlobalDeathEvent);
        }
        if (BoltNetwork.IsClient && !base.entity.HasControl)
            base.state.AddCallback("PEnabled", OnStateEnabled);
}

    private void OnDestroy()
    {
        if (BoltNetwork.IsServer)
        {
            BoltNetwork.RemoveGlobalEventCallback<PlayerSetActiveEvent>(OnPlayerSetActiveEvent);
            BoltNetwork.RemoveGlobalEventCallback<GlobalDeathEvent>(OnGlobalDeathEvent);
        }

        if (BoltNetwork.IsClient && !base.entity.HasControl)
            base.state.RemoveCallback("PEnabled", OnStateEnabled);
    }