Bean class local view SFSB fails to replicate

The attached application contains a simple @SessionScoped SFSB:

@SessionScoped
@Stateful
@Named
public class Foo implements Serializable {

private String text;

public String getText()

{ return text; }

public void setText(String text)

{ this.text = text; }

public void submit()
{

}

@Remove
public void remove() {

}
}

When an action is invoked on the bean, I can see replication failing in the server log. See the attached logs for details. In the first one, the Foo bean does not implement serializable (as it is not required to do so). The second log was captured after the bean has been changed to implement the Serializable interface.

To reproduce:
1) Create two JBoss AS 6 instances as described at https://github.com/weld/core/blob/master/examples/README.md
2) Deploy the attached war file
3) Open http://localhost:8080/foo/foo.xhtml
4) Enter any text and click submit
This is where the replication fails and errors appear in the log
5) Verify text appears at http://localhost:8180/foo/foo.xhtml - you'll need to copy session id parameter as well, e.g. http://localhost:8180/foo/foo.xhtml;jsessionid=PX5Q-ORdeUJLifFqqrOkQA__

Note that the replication succeeds if I use an explicit @Local interface for the Foo bean.