Index: src/wp-content/themes/twentyseventeen/assets/css/editor-style.css
===================================================================
--- src/wp-content/themes/twentyseventeen/assets/css/editor-style.css	(revision 43289)
+++ src/wp-content/themes/twentyseventeen/assets/css/editor-style.css	(working copy)
@@ -236,12 +236,12 @@
 	counter-reset: item;
 }
 
-ol li {
+ol > li {
 	display: block;
 	position: relative;
 }
 
-ol li:before {
+ol > li:before {
 	content: counter(item);
 	counter-increment: item;
 	font-weight: 800;