Icon Box Widget icons get removed from templates

I appears that if I save a template page with the icon box widget, that the icons get removed when I import that template to another site.

Yes, both are updated versions of elementor
Yes, both are updated to the new Font Awesome 5 icons
Yes, I tested it with default and other themes.

It could be that something else is interfering but I had to stop using the icon box widget in the meantime.