SOLVED Font Awesome tags disappear after saving change in source html

[luya]

Hello,

The text editor in source format from Get Simple 3.3.2 is unable to preserve the class attribute code from Font Awesome. For example,

Code:

<ul class="fa-ul">
    <li><span class="fa-li fa fa-check"></i> We stand by our work with a 100% guarantee of excellent service</li>
</ul>

Where fa are the classt attribute provided by Font Awesome. Use the example from the url to reproduce the issue.