panelNavigation2 did not refresh if changed

[Dave]

<t:panelNavigation2  ...>
      <t:navigationMenuItems value="#{bean.menuItems}">
  </t:panelNavigation2>
   
  If bean.menuItems value changes, the panelNavigation2 will not read the 
changes.
  How to make panelNavigation2 react to the changes?
   
  Thanks!
  David
   

       
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