title: mPDF setAutoMargin not working for first page
body: <p>The following code works perfectly for the second, third etc pages, but not for the first one.</p>
  
  <pre><code>/*
   * Encoding
   * Size (A4, etc)
   * Font-size
   * Font-type
   * margin_left
   * margin_right
   * margin_top
   * margin_bottom
   * margin_header
   * margin_footer
   * Orientation
   */
  $this-&gt;mPDF = new mPDF('utf-8', 'A4', 9, 'freesans', 10, 10, 0, 25, 5, 4, 'P');
  $this-&gt;mPDF-&gt;setAutoTopMargin = 'pad';
  
  $html = '&lt;sethtmlpageheader name="myheader" value="on" show-this-page="1"&gt;&lt;/sethtmlpageheader&gt;';
  </code></pre>
  
  <p>In the first page, the body content overlap the header content, while on the other pages the body content doesn't overlap the header content and fits perfectly below the header.</p>
  
  <p>I want the same behavior on the first page, how do I do it?</p>
  
  <p><strong>EDIT 1</strong>:
  An image to illustrate the problem I'm facing
  <a href="https://i.stack.imgur.com/ILqE6.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ILqE6.png" alt="enter image description here"></a></p>