I’ve tested it with a brand new layout, with just the one widget (the icon widget – I picked a different icon, from a different icon set), same result.
Layout export (was small enough I figured WeTransfer wasn’t needed):
{"widgets":[{"icon":"genericons-404","color":"","size":"2","size_unit":"rem","alignment":"center","url":"","title":"","_sow_form_id":"140088395260a4f2f0a2513812301485","_sow_form_timestamp":"1621422851023","ids":"","classes":"","panels_info":{"class":"SiteOrigin_Widget_Icon_Widget","raw":true,"grid":0,"cell":0,"id":0,"widget_id":"4550b3e9-ffa4-4529-bdb8-934e5664eb5e","style":{"id":"","class":"","widget_css":"","mobile_css":"","margin":"","padding":"","mobile_padding":"","background":"","background_image_attachment":"0","background_image_attachment_fallback":"","background_display":"tile","border_color":"","font_color":"","link_color":""}}}],"grids":[{"cells":1,"style":{}}],"grid_cells":[{"grid":0,"index":0,"weight":1,"style":{}}],"name":"Icon Test"}
