Query after save works in Hibernate 3 but not in Hibernate 5.1.2

Question

I have this code who is working in Hibernate 3 but not working in Hibernate 5.1.2 any more. I am not sure why? I debug and session has inside in both version the object but in Hibernate 3 the list is length 1 and in version 5.1.2 is 0. Do you know why? Thank you

@Table( name = "EMPLOYEE" )
public class Employee{

    public Employee(String SSN){
        socialSecurityNumber = SSN;
    }
    
    /* Primary key */
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequence-generator")
    protected long id;
    
    
    @Column(nullable = false, unique = true)
    private long socialSecurityNumber;
}


method of test:
    @Test
    public void testEmployee() throws Exception {

        long intId = new EmployeeIdSequence().newLong();
        Employee emp = new Employee(intId);
        session.save(emp);
        
        @SuppressWarnings("rawtypes")
        Employee emp2;
        Query query = session.createQuery("FROM EMPLOYEE WHERE socialSecurityNumber = :socialSecurityNumber");
        query.setParameter("socialSecurityNumber", new Long(intId), LongType.INSTANCE);
        List<Employee> queryList = query.setHibernateFlushMode(FlushMode.MANUAL).list();
        if (queryList.size() == 1) {
            emp2 = queryList.get(0);
        }
}