Getting Repeated "Navigation failed because browser has disconnected" errors when using puppeteer-cluster

Question

I'm trying to scrape ~1500 URLs in a Node process(es) using the puppeteer-cluster package: https://github.com/thomasdondorf/puppeteer-cluster

I'm doing this on a DigitalOcean droplet with 2GB of RAM, but I'm getting repeated "Navigation failed because browser has disconnected" errors no matter how I tweak the settings. Tempted to remove the package and try to roll it myself to see if I can get better results. Is there something I'm missing?

Here's the gist of the code I'm working with:

  try {
    cluster = await Cluster.launch({
      concurrency: Cluster.CONCURRENCY_BROWSER,
      puppeteerOptions: {
        args: ["--disable-setuid-sandbox", "--no-sandbox"]
      },
      maxConcurrency: 4
    });
  } catch (e) {
    console.log(e.message);
  }

  cluster.on("taskerror", (err, data) => {
    console.log(`Error while crawling: ${err.message}, with this data:`);
    console.log(data);
  });

  await cluster.task(async ({ page, data }) => {
      // Do stuff...
    const {sitemapObject} = data;

    await page.goto(url);

    let result = await page.evaluate(() => {
        // I do some DOM manipulation stuff here. 
        let stuff = {};
        return stuff;
    }
  });

  for (let sitemapObject of sitemapObjects) {
    await cluster.queue({
      sitemapObject
    });
  }

  try {
    await cluster.idle();
    await cluster.close();
  } catch (error) {
    console.log(error.message);
  }