Extended persistence context no longer extended

I have a @ConversationScoped @Stateful bean with a @PersistenceContext(type = PersistenceContextType.EXTENDED) EntityManager em.

I load an object by merging it into the em and storing it in the bean in the normal fashion but when I later do em.persist(foo) the persistence manager tries to insert it as a fresh object. em.contains(foo) also returns false.

This is in trunk, it works on 6.0.0.Final