locust 執行一段時間，使用者數沒減少，但是 RPS 逐漸減少，最後沒有請求

用的locust 1.3.2，也有下載最新的1.4.1都是相同的結果，檢視到使用者數一直都200，但是執行大約一個小時後，就基本沒有請求
也沒有報錯，檢視都沒有報錯，看起來就像是LOCUST使用者突然就不工作了。
看程式碼沒看出什麼問題，有大佬可以幫忙看看嗎？

# -*- coding=utf-8 -*-

import queue
from locust import HttpUser, between, TaskSet, task
from common.api_base import locust_http_client, get_now_time, create_order_id_62, current_issue, decrypt_aes_ecb, \
    get_info


class ChannelTask(TaskSet):
    # tasks = {GameTasks: 1, TradeTasks: 2, TerminalTasks: 1}  # 其他任務，已註釋

    @task(1)
    def update_heartbeat_time(self):
        """對終端心跳時間進行修改"""
        url = "/self/terminal/info/updateHeartbeatTime"
        params = {}
        locust_http_client(self, url, params, self._header, self.key)

    @task(20)
    def bet(self):
        """投注"""
        url = "/trade/bet"
        game_id = "3"
        bet_info = {"betNum": "1|2|2|", "betSN": 1, "multiTimes": 1, "playTypeID": 2010, "wagerMode": 1}
        t = get_now_time()
        issue = self.new_issue[game_id]
        order_id = create_order_id_62(self.terminal_info[1])

        if not self.order_list.full():
            self.order_list.put_nowait(order_id)
        params = {
            "betInfoList": [bet_info],
            "betMoney": 200,  # 投注金額，單位為分
            "betTime": t,  # 投注時間
            "channelType": "1",
            "gameId": game_id,  # 遊戲編號
            "issueNum": issue,  # 遊戲期數，預設從資料庫獲取最新的期數
            "lastIssueNum": issue,  # 連續銷售多期時最後一期期號
            "multiIssue": 1,  # 多期期數
            "operatorId": "",
            "orderId": order_id,  # 訂單編號
            "payType": "1",  # 支付方式
            "userId": '',
            "vip": ""  # 積分卡號
        }
        locust_http_client(self, url, params, self._header, self.key)

    @task(8)
    def reverse(self):
        order_id = self.order_list.get()
        url = '/trade/reverse'
        params = {
            "operatorId": "",  # 操作員
            "orderId": order_id,  # 訂單編號
            "rollbackType": 0,  # 衝正型別(0:地方衝正 1:中心衝正)
        }
        locust_http_client(self, url, params, self._header, self.key)

    def on_start(self):
        self.terminal_info = self.user.terminal_list.get()
        # self.terminal_info = next(self.query_sql)
        self._header = {"Content-Type": "application/json;charset=UTF-8",
                        'stationCode': self.terminal_info[0],
                        'terminalCode': self.terminal_info[1],
                        'uniqueId': self.terminal_info[2],
                        'certCode': self.terminal_info[3]}
        self.order_list = queue.Queue(maxsize=5)
        self.new_issue = current_issue()
        header = {"Content-Type": "application/json;charset=UTF-8"}
        url = "/terminal/info/getPriKey"  # 獲取私鑰
        params = {"stationCode": self.terminal_info[0], "terminalCode": self.terminal_info[1]}
        with self.client.post(url, json=params, headers=header, verify=False, catch_response=True) as response:
            re_result = response.json()
            if response.status_code == 200 and re_result['code'] == 0:
                response.success()
            else:
                response.failure("%s,%s" % (self.terminal_info[1], re_result))
        self.key = decrypt_aes_ecb(re_result)  # 只返回key

        url = "/self/terminal/info/terminalLogin"  # 登陸
        params = {"terminalCertId": self.terminal_info[3], "uniqueId": self.terminal_info[2]}
        locust_http_client(self, url, params, self._header, self.key)

        url = "/self/terminal/info/syncTime"  # 同步時間
        params = {}
        locust_http_client(self, url, params, self._header, self.key)


class ChannelUser(HttpUser):
    wait_time = between(0.5, 1)
    host = "https://10.13.1.80:9999"
    tasks = [ChannelTask]
    terminal_list = queue.Queue()
    query_sql = get_info('terminal_cert_40130900.yaml')
    for i in query_sql['info']:
        terminal_list.put_nowait(i)