Index: src/wp-content/themes/twentyseventeen/style.css
===================================================================
--- src/wp-content/themes/twentyseventeen/style.css	(revision 39370)
+++ src/wp-content/themes/twentyseventeen/style.css	(working copy)
@@ -3002,6 +3002,7 @@
 }
 
 .twentyseventeen-front-page.twentyseventeen-customizer #primary article.panel-placeholder {
+	display: none; 
 	border: 0;
 }