Backoffice Custom Section Refresh

We implemented a custom section in backoffice with the help of a bean implementing WidgetComponentRenderer.

  <context type="CustomCronJob" component="editor-area" merge-by="type" parent="CronJob">
     <editorArea:editorArea name="">
         <editorArea:tab name="hmc.tab.companyname" position="1">
             <editorArea:section name="hmc.section.catalogInterface">
                 <editorArea:customPanel colspan="2" name="custom" spring-bean="customBean" />

All works fine. Though the bean is called only when the item is selected. After that BO seems to cache the GUI. How can I control the refresh of the custom section?