Generating a PDF from HTML using Puppeteer duplicates content

Question

I've noticed when generating a PDF from HTML using puppeteer, it's sometimes duplicating the bottom content on the next page..

e.g. you can see here the table header is repeated on the next page. I've checked the HTML, and it definitely doesn't repeat.

Any idea why it's doing that?

My code looks like this..

const htmlToPdf = async html => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  // https://pptr.dev/#?product=Puppeteer&version=v13.6.0&show=api-pagesetcontenthtml-options
  await page.setContent(html);
  // https://pptr.dev/#?product=Puppeteer&version=v13.6.0&show=api-pagepdfoptions
  const buffer = await page.pdf({
    format: 'A4',
    printBackground: true
  });

  await browser.close();

  return buffer;
};