title: Angular SSR First Paint appears after styles.css being loaded
body: <p>I implemented angular universal for my app and served it on a server. But after index.html was loaded browser didn't display any content until styles.css being downloaded. index.html from server contains required HTML and styles.</p>
  <p><a href="https://i.stack.imgur.com/2zUYs.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2zUYs.jpg" alt="On screenshot" /></a> On the screenshot you can see:</p>
  <ol>
  <li>time when index.html was downloaded,</li>
  <li>when styles where downloaded</li>
  <li>when the first content appears</li>
  </ol>
  <p>What can block page content to be displayed, as I expect first content to be displayed after step 1?</p>