Stuck for no reason?

i have a list that has 1.8k urls, but when

await crawler.queue(urls)

it seems stuck randomly without timeout?

const fs = require('fs')
const _ = require('lodash')
const writeJsonFile = require('write-json-file')
const HCCrawler = require('headless-chrome-crawler')
const RedisCache = require('headless-chrome-crawler/cache/redis')
const cache = new RedisCache({ host: '127.0.0.1', port: 6379 })

let urls = getUrls()
let count = urls.length

async function p1() {
  const crawler = await HCCrawler.launch({
    cache,
    persistCache: true,

    evaluatePage: (() => ({
      title: $('#litZQMC').text(),
      html: $('#divScroll').html()
    })),

    onSuccess: async resp => {
      const { result: { title, html } } = resp
      if (fs.existsSync(`files/${title}.txt`)) {
        console.log('skip', count--, title)
      } else {
        await writeJsonFile(`files/${title}.txt`, html)
        console.log('done', count--, title)
      }
    },

    onError: err => {
      console.log(err)
    }
  })

  await crawler.queue(urls)
  await crawler.onIdle()
  await crawler.close()
}

async function queue() {
  await p1()
}

queue()

• Version: 1.8.0
• Platform / OS version: osx
• Node.js version: v8.11.3