Icon preview doesn't show when "Use CDN" is checked

Problem/Motivation

When Font Awesome is set to "Use external file (CDN) / local file?" and use a FontAwesome CDN kit as the external location, the autocomplete field does not show any previews of the icons. When that is unchecked, it loads previews fine.

I thought I read somewhere (Slack?) that this might be a known issue of the pro kits, but I don't see it as an issue here in the queue so I wanted to bring it up.

Thanks.