Index: wp-content/themes/twentytwenty/assets/css/editor-style-block.css
===================================================================
--- wp-content/themes/twentytwenty/assets/css/editor-style-block.css	(revision 58233)
+++ wp-content/themes/twentytwenty/assets/css/editor-style-block.css	(working copy)
@@ -1157,6 +1157,7 @@
 
 .editor-styles-wrapper ul.wp-block-post-template {
 	padding-left: 0;
+	max-width: 100%;
 }