diff --git a/wp-content/themes/twentyseventeen/assets/js/customize-preview.js b/wp-content/themes/twentyseventeen/assets/js/customize-preview.js
index 11c9ed46ae..e5d4ee16d7 100644
--- a/wp-content/themes/twentyseventeen/assets/js/customize-preview.js
+++ b/wp-content/themes/twentyseventeen/assets/js/customize-preview.js
@@ -8,6 +8,10 @@
 
 	// Collect information from customize-controls.js about which panels are opening.
 	wp.customize.bind( 'preview-ready', function() {
+		
+		// Initially hide the theme option placeholders on load
+		$( '.panel-placeholder' ).hide();
+		
 		wp.customize.preview.bind( 'section-highlight', function( data ) {
 
 			// Only on the front page.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ff366f0ceb..7d9ef36de1 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39415';
+$wp_version = '4.8-alpha-39417';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.