_socketClient.UnifiedApi.Trading.SubscribeToOrderUpdatesAsync cause high cpu, with no trading and data subscription.

[anthonyyfu]

I called this method (SubscribeToOrderUpdatesAsync()), and there's no trading, and of course no orderupdate callback received. wail for 20 minutes, the cpu usage will by very high. I'm using .net framework 4.7. and have tried on 3 different pc/server. all the same result. high cpu.
In this code, I firstly selected 20 symbols, and they called SubscribeToOrderUpdatesAsync() for each of them.

                var instrumentSecetedList = instrumentList.Where(record =>
                {
                    return record.Symbol.StartsWith("BTC-")
                           || record.Symbol.StartsWith("ETH-")
                           || record.Symbol.StartsWith("SOL-")
                           || record.Symbol.StartsWith("BCH-")
                           || record.Symbol.StartsWith("EOS-")
                           || record.Symbol.StartsWith("LTC-")
                           || record.Symbol.StartsWith("TRX-")
                           || record.Symbol.StartsWith("UNI-")
                           || record.Symbol.StartsWith("XLM-")
                           ;
                });

                Console.WriteLine(string.Join("\t", instrumentList.Select(a => a.Symbol)));

                foreach (var instrument in instrumentSecetedList)
                {

                    var result = _socketClient.UnifiedApi.Trading.SubscribeToOrderUpdatesAsync(OKXInstrumentType.Swap, instrument.Symbol, null, dataEvent => ExchangeTradingOrderUpdate(dataEvent.Data),
                        _clientCts.Token).Result;
                    Console.WriteLine($"{instrument} TradingApicSubscribed");

                    if (!result.Success)
                    {
                        Logger.Warn("futuresCoinUserDataUpdateResp failed! Message:(" + result.Error?.Message + ")");
                        throw new TxException("Client has not been initialized");
                    }
                }

[anthonyyfu]

I'm using 32bit (x86), because I have to use a old component which have to be called in 32bit. hope it's not the reason of high cpu. 4 core/8 hyperthread, and use up to 30% of cpu whitout doing anything. Thank you for help!