visual composer bug and solution

Hello.
Recently i came to know one bug of visual composer.  Visual composer ignore

some classes and icons and span.

Problem : 

When you write this in visual composer 

<div class="features_icon"><i class="fa fa-video-camera"></i></div>

Visual composer display only this:

 <div class="features_icon"></div>

It removes icon and <i>

Solution :

<div class="features_icon">

      <i class="fa fa-video-camera">

            <span style="display: none;">1</span>

      </i>

</div>

It will display your icon.