Adding custom icon to Social Profiles – Icon doesn't display

I’m trying to add a custom icon to Social Profiles, everything works except the icon doesn’t display. I’m using default enfold icons. ue800 and ue8f3 display no icon. There is a space for where the icon should go and it’s clickable, just no icon.

if(isset($avia_config['use_child_theme_functions_only'])) return;
// Register new icon as a theme icon
function avia_add_custom_icon($icons) {
	$icons['Telegram']	 = array( 'font' =>'fontello', 'icon' => 'ue8f3');
	return $icons;
}
add_filter('avf_default_icons','avia_add_custom_icon', 10, 1);

// Add new icon as an option for social icons
function avia_add_custom_social_icon($icons) {
	$icons['Telegram'] = 'Telegram';
	return $icons;
}
add_filter('avf_social_icons_options','avia_add_custom_social_icon', 10, 1);

What needs to be done to get the icon to display? Using latest version of WP and Enfold.