Any errors in the logs?Can you do a view source of the page to confirm that the HTML fragment has vanished?Could it be a browser/UI issue?Need more info to resolve the issue....
Caused by: java.lang.RuntimeException: Could not invoke method: doRender, reason: [color=red]getAttribute: Session already invalidated[/color]
at com.interwoven.livesite.common.util.ClassUtils.executeMethod(ClassUtils.java:113)
at com.interwoven.livesite.common.pojo.PojoMethodCall.executeMethod(PojoMethodCall.java:400)
at com.interwoven.livesite.common.pojo.PojoMethodCall.execute(PojoMethodCall.java:454)