The declaration is missing in header section of html
<link rel="stylesheet" href="assets/fonts/font-awesome.min.css">
when I place these two components by drag and drop and edit class manually - nested i-tag inside a-tag.
<a href="#about"><i class="fa fa-angle-double-down animated"></i></a>
The declaration appears instantly, when I convert these two components to a custom code. Without the font, arrows are not displayed after export, but they are visible editor window.