title: Images disappear after uploading a doc with conversion
body: <p>When using the 'insert' DRIVE API function, in combination with the multi-part type. The images that are in my document appear to be stripped? It's just normal HTML with a img tag.</p>
  
  <p>Some 2 weeks ago it worked fine, but somehow it stopped working.</p>
  
  <p>I can provide sample HTML and the result GDocs file if needed.</p>