rich:tree several clicks

[blabno]

When i click on a node on my tree then it fires processSelection method on backing bean. but when i click the same node again it does nothing except displaying "processing request" (status item).

<rich:tree id="systemTree"
 nodeSelectListener="#{categoryManager.processSelection}"
 ajaxSubmitSelection="true"
 switchType="ajax"
 binding="#{systemTree}"
 var="item"
 nodeFace="#{categoryManager.getNodeFace(item)}"
 adviseNodeSelected="#{categoryManager.adviseNodeSelected}"
 reRender="systemTree,properties"
 >
 <rich:treeNode type="unselected">
 #{item.name}
 </rich:treeNode>
 <rich:treeNode type="selected" nodeClass="categorySelected">
 #{item.name}
 </rich:treeNode>
</rich:tree>