流程是这样的：搜索到设备关闭搜索关闭蓝牙连接然后弹框，点击确定以后继续调用这个方法开启搜索，我的两个手机测试的都没问题，朋友的手机点五次弹框以后就不搜索了，这是什么bug

代码片段：

lanya() {
    let that = this
    wx.openBluetoothAdapter({
      success: function (res) {
        console.log(res)
        //开始搜索蓝牙
        wx.startBluetoothDevicesDiscovery({
          success: function (res) {
            console.log('search', res)
            wx.onBluetoothDeviceFound(function (devices) {
              console.log('发现设备22', devices.devices)
              for (let i = 0; i < devices.devices.length; i++) {
                if (!(undefined == devices.devices[i].localName)) {
                  //检索指定设备
                  if (devices.devices[i].localName.split('-')[0] == 'HRC') {
                    console.log('已找到指定设备:', devices.devices[i].localName);
                    //关闭搜索
                    wx.stopBluetoothDevicesDiscovery({
                      success (res) {
                        console.log('关闭搜索',res)
                      }
                    });
                    //关闭蓝牙连接
                    wx.closeBluetoothAdapter({
                      success: function (res) {
                        console.log('关闭蓝牙连接',res)
                      }
                    });
                    wx.showModal({
                      title: '提示',
                      content: '发现设备：' + devices.devices[i].localName,
                      showCancel: false,
                      success: function (res) {
                        if (res.confirm) {
                          console.log('用户点击确定')
                          that.lanya()
                        }
                      }
                    })
                    break;
                  }
                }
              }
            })
          }
        })
      },
      fail: function (res) {
        wx.showModal({
          showCancel: false,
          content: '请先开启手机蓝牙',
          success: function (res) {
            setTimeout(function () {
              that.lanya()
            }, 5000)
          }
        })
      }
    })
  }