@Entity
@Table(name = "courses")
public class Course implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "course_id", unique = true, nullable = false)
    protected Integer id;
    
    ...
    
}

@Entity
@Table(name = "students")
public class Student {
    @Id
    @Column(unique = true, nullable = false)
    private Integer studentId;

    @OneToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    private List<Course> courses = new ArrayList<>();

    ...
}

sudentRepo.save(createStudentWithCourses(1, 1, 2));
sudentRepo.save(createStudentWithCourses(2, 3, 4));

@Test
public void test_whenUsingList_WorksAsExpected_WithAnyHibernate5_3_11_plus() throws HibernateException {
    //obtain session factory
    SessionFactory sessionFactory = factory.unwrap(SessionFactory.class);
    //open session
    Session session = sessionFactory.openSession();

    //Obtain students via list()
    List<Student> studentList = session
            .createQuery("from org.example.Student")
            .list();
    //close session
    session.close();

    //expecting to have at least 1 student at index 0
    Student student = studentList.get(0);

    //expecting to have a course with id 1
    Assert.assertEquals(1, student.getCourses().get(0).getId().intValue());
}

@Test
public void test_whenUsingScroll_FailsWithLazyInitializationException_StartingWithHibernate5_3_11() throws HibernateException {
    //obtain session factory
    SessionFactory sessionFactory = factory.unwrap(SessionFactory.class);
    //open session
    Session session = sessionFactory.openSession();

    //Obtain students via ScrollableResults 
    ScrollableResults scroll = session
            .createQuery("from org.example.Student")
            .scroll(ScrollMode.FORWARD_ONLY);
    ScrollableResultsIterator<Student> iterator = new ScrollableResultsIterator(scroll);
    Spliterator spliterator = Spliterators.spliteratorUnknownSize(iterator, 256);
    Stream<Student> stream = StreamSupport.stream(spliterator, false);
    List<Student> studentList = stream.collect(Collectors.toList());

    //close session
    session.close();

    //expecting to have at least 1 student at index 0
    Student student = studentList.get(0);

    //expecting to have a course with id 1
    Assert.assertEquals(1, student.getCourses().get(0).getId().intValue());
    //But what happens is that the following exception is thrown
    //org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: org.example.Student.courses, could not initialize proxy - no Session
}

private void prepareCurrentRow(boolean underlyingScrollSuccessful) {
   ...
   persistenceContext.beforeLoad();
   ...
}