update

js/Desktop/DeskTop.js

@@ -6968,7 +6968,11 @@ U.MD.D.I.openApplicationJieTeacher = function (str, cid, stage, task, tool, stud
                 U.MD.D.I.getContent(cid, stage, task, tool, _userid, '3', _iframe)
             };
             if (onloadListener) {
-                _iframe.contentDocument.location.reload()
+                try {
+                    _iframe.src += ""
+                    _iframe.contentDocument.location.reload()
+                } catch (error) {
+                }
             } else {
                 _iframe.contentDocument.location.reload()
             }