JSF commandButton action not invoked when rendered attribute is set

I'm having a problem with JSF CommandButton action not being invoked. I have a managed bean roleController, as in

@ManagedBean(name = "roleController")
@RequestScoped
public class RoleController {
        public Role getSelectedRole() {
    return selectedRole;
}

public void updateSelectedRole() {
    System.out.println(selectedRole.getRole());
}

In my .jsf file I'm trying to edit invoke updateSelectedRole action on h:commandButton, but it doesn't seem to work. I've tried to change the method name to incorrect one, and there's no exception thrown - but when I do the same with other form, the exception is thrown - so most likely the action isn't even invoked.

<h:panelGroup rendered="${param.action == 'edit'}">
    <h:form>
        <ol>
            <li>
                <label for="ID">
                    <h:outputText value="#{msg.roleEditID}" />
                </label>
                <h:inputText readonly="true" 
                    value="#{roleController.selectedRole.id}" />
            </li>
            <li>
                <label for="Role">
                    <h:outputText value="#{msg.roleEditRole}" />
                </label>
                <h:inputText value="#{roleController.selectedRole.role}" />
            </li>
            <li>
                <h:commandButton value="#{msg.buttonUpdate}" 
                    action="#{roleController.updateSelectedRole()}"/>
            </li>
        </ol>
    </h:form>
</h:panelGroup>

I found that it may be caused be nested forms, but that's not the case in this example. Is it possible that the root of this problem is my navigation rule?

<navigation-rule>
    <from-view-id>/admin/roles.xhtml</from-view-id>
    <navigation-case>
        <to-view-id>/admin/roles.xhtml</to-vie