Ticket #39032: 39032.3.diff

src/wp-includes/theme.php

@@ -1786 +1786 @@
                 $r = wp_update_post( wp_slash( $post_data ), true );
         } else {
                 $r = wp_insert_post( wp_slash( $post_data ), true );
+                // Trigger creation of a revision. See #30854
+                if ( $r && ! is_wp_error( $r ) ) {
+                        wp_save_post_revision( $r );
+                }
         }
 
         if ( $r instanceof WP_Error ) {