Revolution Slider Some Icon Fonts not displaying in edit interface

I can get certain fonts to show up in the Revolution Slider Edit interface but not all of them. I just spent about an hour researching why I could not get <i class="fa fa-paw"></i> to display in edit mode of a slide I was working on. But I happen to load the page an hour later to look at another edit only to see the font of the paw actually worked. Is this a bug?

This icon <i class"pe-7s-paint"></i> does work in the edit window though and on the page as well.

Hi there,

There is a coming soon page active on your site.

Would you mind providing the password in a Secure Note so that we can check it?

Thank you.