spring @PreDestroy not called when using native session management

[Steve B]

Hi all,

I'm trying to setup a web project using Spring, Shiro but I'm having problems
with session-scoped beans like this one

@Named
@Scope(proxyMode = ScopedProxyMode.TARGET_CLASS, value = "session")
public class SessionBean {

    @PostConstruct
    public void init()

    @PreDestroy
    public void destroy()
}

Using Shiro's default "ServletContainerSessionManager" both methods are called
as expected, but when I switch to native session management with
DefaultWebSessionManager the pre-destroy method is never called (post construct
gets called). The validationScheduler runs, and the globalSessionTimeout has
been set.

Anyone knows whats happening here ? I've uploaded a small example project on
http://ge.tt/8Co4haK1/v/0  (just comment out the sessionManager in
applicationContext.xml to see the working @PreDestroy).

Thanks,

Steve