<h:commandButton> not consistently invoking action

[Anthony Castillon]

I have a form built using JSF and RichFaces. Here's a snippet of the code:

<h:form id="newContactModalForm">

....... Form input code here

<h:panelGrid columns="1" style="width: 100%" border="0">
<h:panelGroup>
<h:commandButton action="addPerson" value=" Save " 
oncomplete="#{rich:component('newContactModalPanel ')}.hide();return true;" 
rendered="true" style="margin-right: 3px"/>

</h:panelGroup> 
</h:panelGrid>

......

I'm also using Spring WebFlow and here's the addPerson action in my flow xml:

<transition on="addPerson">
<evaluate expression="viewScope.personBean.setUpdatedBy(curr entUser.name)"/> 
<evaluate expression="personManager.persistPerson(viewScope. personBean)" result="viewScope.person" /> 
</transition>

I noticed that the addPerson action on the commandButton does not get called consistently when it is clicked. I've been reading forums and it seems that there is a problem with the h:commandButton not invoking the action bound to it. However, I don't see any post explaining why the problem is happening and what to do to resolve it.

I need help.

Thanks.