Session timeout for any Ajax request on GateIn 3.5.0 (jboss) portal

Deploy a portlet on GateIn 3.5.0.
Fire an onClick event
Expected: Event should work as expected
Actual: Gets a standard ZK session timeout message box.

Note:
1.Page reload and during ajax event the desktop id is the same.
2.DHTMLUpdateServlet#process method call to getDesktop returns null. getDesktop checks if desktop id is present in desktopCache
3.During the page load native session is PortletSession however during Ajax request processing session is StandardSessionFacade