ESP32连接Hive MQTT Broker异常：WebSocket接入时断开重连求助

我的代码可让ESP32成功连接到Hive MQTT Broker，但当我通过Hive WebSocket客户端网站建立连接时，ESP32会断开连接并执行重连操作——此时client.connected()会变为false，触发reconnect()函数。我不清楚该问题的原因，如需复现需在Hive MQTT网站创建集群并完善代码中的WiFi及云服务信息。

以下是我的代码：

#include <WiFiClientSecure.h>
#include <esp_crt_bundle.h>
#include <ssl_client.h>

#include <Arduino.h>
#include <WiFi.h>
#include <PubSubClient.h>

/****** root certificate *********/

static const char *root_ca PROGMEM = R"EOF(
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----
)EOF";

/*** WiFi Connection Details ***/
const char* hotspotName = "";
const char* password = "";

/*** MQTT Broker Connection Details ***/
const char* mqttServer = "";
const char* brokerUser = "";
const char* brokerPassword = "";


WiFiClientSecure mqttClient;
PubSubClient client(mqttClient);

void setupWifi(){

  delay(1000);
  Serial.print("\nConnecting to: ");
  Serial.println(hotspotName);

  WiFi.mode(WIFI_STA);
  WiFi.begin(hotspotName, password);

  while(WiFi.status() != WL_CONNECTED){

    delay(100);
    Serial.print("-");

  }

  Serial.print("\nConnected to: ");
  Serial.println(hotspotName);

  randomSeed(micros());
  Serial.println("\nWiFi connected\nIP address: ");
  Serial.println(WiFi.localIP());

}

void reconnect(){

  while(!client.connected()){

    Serial.print("\nConnecting to: ");
    Serial.println(mqttServer);

    String clientId = "ESP32Client-";   // Create a random client ID
    clientId += String(random(0xffff), HEX);
    Serial.print("Client ID: ");
    Serial.println(clientId);


    if(client.connect(clientId.c_str(), brokerUser, brokerPassword)){
      Serial.print("\nConnected to: ");
      Serial.println(mqttServer);
    }
    else{
      Serial.println("\nTrying to connect again");
      delay(5000);
    }

  }

}


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  delay(10000);
  setupWifi();
  mqttClient.setCACert(root_ca);
  
  client.setServer(mqttServer, 8883);
}

void loop() {
  // put your main code here, to run repeatedly:

  if(!client.connected()){
    reconnect();
  }
  client.loop();
  
}

我期望建立连接后client.connected()能保持为true。

内容的提问来源于stack exchange，提问作者Jack Brady