diff --git a/app/controllers/issues_controller.rb b/app/controllers/issues_controller.rb
index c65dcf598..7cdc838e2 100644
--- a/app/controllers/issues_controller.rb
+++ b/app/controllers/issues_controller.rb
@@ -147,6 +147,7 @@ class IssuesController < ApplicationController
     #2. project persons
     @at_persons = @journals.map(&:user) + @issue.project.users
     @at_persons = @at_persons.uniq{|u| u.id}.delete_if{|u| u.id == User.current.id}
+    @at_persons = nil
 
     respond_to do |format|``
     format.html {
diff --git a/public/assets/kindeditor/at/config.js b/public/assets/kindeditor/at/config.js
index 44947828f..b9769c42e 100644
--- a/public/assets/kindeditor/at/config.js
+++ b/public/assets/kindeditor/at/config.js
@@ -8,11 +8,9 @@ function enableAt(_editor) {
     var doc = ifr.contentDocument || iframe.contentWindow.document;
     var ifrBody = doc.body;
     ifrBody.contentEditable = true;
-
     console.log("enable at");
 
     $.fn.atwho.debug = true;
-
     if(!atPersonLists){
         return;
     }