Index: src/wp-content/themes/twentyseventeen/style.css
===================================================================
--- src/wp-content/themes/twentyseventeen/style.css	(revision 43542)
+++ src/wp-content/themes/twentyseventeen/style.css	(working copy)
@@ -3755,6 +3755,7 @@
 	/* With panel images 100% of the screen height, we're going to fix the background image where supported to create a parallax-like effect. */
 	.background-fixed .panel-image {
 		background-attachment: fixed;
+		backface-visibility: hidden;
 	}
 
 	.page-two-column .panel-content .entry-header {