Hello!
I'm developing a part of an application used for administration of bosses.
I've added possibility to add and remove bosses from DB.
The problem is when I try to remove a boss, the selectOneMenu and s:selectItems
doesn't rerender, the removed boss still appears in the drop-down box.
It rerenders only when I do a explicit refresh (ctrl f5).
Here is my code:

createBoss.xhtml

<div class="overview"
     xmlns="http://www.w3.org/1999/xhtml"
     xmlns:ui="http://java.sun.com/jsf/facelets"
     xmlns:h="http://java.sun.com/jsf/html"
     xmlns:f="http://java.sun.com/jsf/core"
     xmlns:rich="http://richfaces.org/rich"
     xmlns:a4j="http://richfaces.org/a4j"
     xmlns:riskintyg="http://www.riskintyg.se/faceletsComponents"
     xmlns:s="http://jboss.com/products/seam/taglib">

    <a4j:outputPanel ajaxRendered="true">
        <h:messages styleClass="message"/>
        <rich:simpleTogglePanel switchType="client" label="Skapa chef">
            <h:panelGrid columns="1">
                <h:form>
                    <riskintyg:simpleInput label="Namn" value="#{boss.name}" required="true"/>
                    <riskintyg:simpleInput label="Titel" value="#{boss.title_sv}" required="true"/>
                    <riskintyg:simpleInput label="Engelsk titel" value="#{boss.title_en}" required="true"/>
                    <a4j:commandButton action="#{bossController.createBoss}" value="Skapa chef"
                                       style="float:left"/>
                </h:form>
            </h:panelGrid>
        </rich:simpleTogglePanel>
        
        <rich:simpleTogglePanel switchType="client" label="Ta bort chef">
            <h:panelGrid columns="1">
                <h:form>
                    <h:selectOneMenu value="#{boss}" >
                        <s:selectItems value="#{bosses}" var="boss" label="#{boss.name}"  />
                        <s:convertEntity/>
                    </h:selectOneMenu>
                    <a4j:commandButton action="#{bossController.deleteBoss}" value="Ta bort chef" style="float:left"/>
                </h:form>
            </h:panelGrid>
        </rich:simpleTogglePanel>
    </a4j:outputPanel>            
</div>

The backing bean BossController.java

@Name("bossController")
@Scope(SESSION)
@Restrict("#{identity.loggedIn}")
public class BossController  {

    @In
    private EntityManager entityManager;

    @Logger
    private Log log;

    @In
    private FacesMessages facesMessages;

    @In
    private Boss boss;

    @DataModel
    List<Boss> bosses;
    
    /**
     * Creates a new boss and stores the entity into DB.
     *
     * @param boss the <class>Boss</class> object to be stored.
     * @throws IllegalArgumentException if argument boss is null.
     */
    public void createBoss() {
        bosses.add(boss);
        entityManager.persist(boss);
        log.info("Boss created, " + boss);
        facesMessages.add("#{messages['boss.created']}");
    }

     /**
     * Deletes the selected boss from DB.
     *
     * @param boss the <class>Boss</class> object to be deleted.
     * @throws IllegalArgumentException if argument boss is null.
     */
    public void deleteBoss() {
         bosses.remove(boss);
         entityManager.remove(boss);
         log.info("Boss deleted, " + boss);
         boss = null;
         facesMessages.add("#{messages['boss.deleted']}");
     }

    @Factory("bosses")
    @SuppressWarnings("unchecked")
    public void findAllBosses(){
        bosses =  entityManager.createNamedQuery("findAllBosses").getResultList();
    }
}