Sesame

I have a strange issue with alibaba objects, were if two instances of an
object are open, a setProperty() on one of them will result in
getProperty() of the other one returning the changed value, but not
getProperty() of the object on which setProperty() was called. I would
like to know if this is expected behaviour, or if it is bug.

Reproducable testcase:

    @Test
    @Transactional
    public void createThenGet1() throws Exception {
        URI uri = conn().getValueFactory().createURI("u:1");
        TestNode node1 =
        conn().addDesignation(conn().getObjectFactory().createObject(uri),
        TestNode.class);
        node1.setLatitude(14.0);
        node1.setLongitude(15.0);
        TestNode node2 = conn().getObject(TestNode.class, uri);
        node2.setLatitude(12.0);
        node2.setLongitude(13.0);
        Assert.assertEquals(node1, node2);
        Assert.assertEquals(12.0, node2.getLatitude(), 0.0); // fails:
        expected: <12.0> but was: <14.0>
    }

The following testcase succeeds (reads the property from node1 instead
of node2):

    @Test
    @Transactional
    public void createThenGet2() throws Exception {
        URI uri = conn().getValueFactory().createURI("u:1");
        TestNode node1 =
        conn().addDesignation(conn().getObjectFactory().createObject(uri),
        TestNode.class);
        node1.setLatitude(14.0);
        TestNode node2 = conn().getObject(TestNode.class, uri);
        node2.setLatitude(12.0);
        Assert.assertEquals(node1, node2);
        Assert.assertEquals(12.0, node2.getLatitude(), 0.0); // succeeds
    }

TestNode.class:

    @iri("u:geonode")
    public interface TestNode extends RDFObject {
        @iri("u:lat")
        Double getLatitude();
        void setLatitude(Double latitude);

        @iri("u:lon")
        Double getLongitude();
        void setLongitude(Double longitude);
    }

Kind regards, GdV