WebSocket sending fails unless I use InvokeRepeating - unity3d

Question

I've implemented a socket connection module according to the instructions here
https://github.com/endel/NativeWebSocket
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using NativeWebSocket;
public class Connection : MonoBehaviour
{
WebSocket websocket;
public bool SpamSend;
public float spamEvery = 3f;
public string uri = "ws://localhost:2567";
[TextArea] public string message;
private string CurrectData;
// Start is called before the first frame update
async void Start()
{
CurrectData = message;
websocket = new WebSocket(uri);
InitilizeWebSocket();
}
async void InitilizeWebSocket()
{
websocket.OnOpen += () =>
{
Debug.Log("Connection open!");
};
websocket.OnError += (e) =>
{
Debug.Log("Error! " + e);
};
websocket.OnClose += (e) =>
{
Debug.Log("Connection closed!");
};
websocket.OnMessage += (bytes) =>
{
Debug.Log("OnMessage!");
//Debug.Log(bytes);
// getting the message as a string
var message = System.Text.Encoding.UTF8.GetString(bytes);
Debug.Log("OnMessage! " + message);
};
if(SpamSend)
// Keep sending messages at every 0.3s
InvokeRepeating("SendWebSocketMessage", 0.0f, spamEvery);
// waiting for messages
await websocket.Connect();
}
void Update()
{
#if !UNITY_WEBGL || UNITY_EDITOR
websocket.DispatchMessageQueue();
#endif
}
async void SendWebSocketMessage()
{
if (websocket.State == WebSocketState.Open)
{
// Sending bytes
// await websocket.Send(new byte[] { 10, 20, 30 });
// Sending plain text
await websocket.SendText(CurrectData);
CancelInvoke("SendWebSocketMessage");
}
}
private async void OnApplicationQuit()
{
await websocket.Close();
}
}
you may now notice the oddity of "invokeRepeating" and CancelInvoke.
this is where I've encountered a problem.
when I tried to just Invoke, I received no response from the server as if it was never sent.
nor when I tried a coroutine - with or without waitForSeconds.
nor when I simply tried SendWebSocketMessage().
What did I miss that only the invokeRepeating made it through?