diff --git a/wagtail/wagtailadmin/static/wagtailadmin/js/blocks/sequence.js b/wagtail/wagtailadmin/static/wagtailadmin/js/blocks/sequence.js
index 09617e160..e87e6009f 100644
--- a/wagtail/wagtailadmin/static/wagtailadmin/js/blocks/sequence.js
+++ b/wagtail/wagtailadmin/static/wagtailadmin/js/blocks/sequence.js
@@ -48,7 +48,7 @@ CODE FOR SETTING UP SPECIFIC UI WIDGETS, SUCH AS DELETE BUTTONS OR MENUS, DOES N
             // focus first suitable input found
             var timeout = setTimeout(function(){
                 $('.input input,.input textarea,.input .richtext', self.container).first().focus();
-            }, 10);
+            }, 250);
         };
         self.getIndex = function() {
             return parseInt(indexField.val(), 10);