Empty the element before append new child.

framework/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared/wwwroot/libs/abp/aspnetcore-mvc-ui-theme-shared/datatables/datatables-extensions.js

@@ -238,7 +238,7 @@ var abp = abp || {};
 
                     var $actionButton = $(cells[colIndex]).find(".abp-action-button");
                     if ($actionButton.length === 0) {
-                        $(cells[colIndex]).append($actionContainer);
+                        $(cells[colIndex]).empty().append($actionContainer);
                     }
                 }
             }