Bybit socket keepalive interval sending incrementally more messages, resulting in increasing network usage even though the actual data being received is very limited

gistfile1.cs

using System.Diagnostics;
using System.Net.WebSockets;
using System.Text;

var socket = new ClientWebSocket();
socket.Options.KeepAliveInterval = TimeSpan.FromSeconds(1);
socket.Options.SetBuffer(65536, 65536);
await socket.ConnectAsync(new Uri("wss://stream.bybit.com/spot/quote/ws/v2"), default);

var readThread = new Thread(async () =>
{
    while (true)
    {
        var sw = Stopwatch.StartNew();
        var result = new byte[1048576];
        int index = 0;
        while (true)
        {
            var buffer = new byte[4096];
            var rec = await socket.ReceiveAsync(buffer, default);
            Array.Copy(buffer, 0, result, index, rec.Count);
            index += rec.Count;
            if (rec.EndOfMessage)
                break;
        }
        var strData = Encoding.UTF8.GetString(new ArraySegment<byte>(result, 0, index));
        Console.WriteLine($"Received data in {sw.ElapsedMilliseconds}: " + strData);
    }
});
readThread.Start();

var data = "{\"topic\":\"realtimes\",\"params\":{\"symbol\":\"BTCUSDT\"},\"event\":\"sub\"}";
var bytes = Encoding.UTF8.GetBytes(data);
Console.WriteLine($"Sending {bytes.Length}");
await socket.SendAsync(bytes, WebSocketMessageType.Text, true, default);
Console.WriteLine($"Send done");

Console.ReadLine();