Saxon 9.9 StreamReader is broken

SaxonStreamReaderTest.java

package net.sf.saxon;

import com.saxonica.xqj.SaxonXQDataSource;
import net.sf.saxon.om.IgnorableSpaceStrippingRule;
import org.junit.jupiter.api.Test;

import javax.xml.stream.XMLStreamReader;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stax.StAXSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xquery.*;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.StringWriter;

import static org.junit.jupiter.api.Assertions.*;

public class SaxonStreamReaderTest {

  private final static TransformerFactory XTF;

  private static Configuration CONFIG;

  static {
    CONFIG = new Configuration();
    CONFIG.getParseOptions().setSpaceStrippingRule(IgnorableSpaceStrippingRule.getInstance());
    XTF = new BasicTransformerFactory(CONFIG);
  }

  private XQSequence executeQuery() throws XQException {
    SaxonXQDataSource ds = new SaxonXQDataSource(CONFIG);
    XQConnection con = ds.getConnection();

    InputStream query = getClass().getClassLoader().getResourceAsStream("test.xq");
    assertNotNull(query);

    XQStaticContext ctx = con.getStaticContext();
    ctx.setBindingMode(XQConstants.BINDING_MODE_DEFERRED);
    con.setStaticContext(ctx);

    XQPreparedExpression expr = con.prepareExpression(query);

    XQSequence result = expr.executeQuery();
    assertNotNull(result);

    return result;

  }

  @Test
  void itShouldWriteToOutputStream() throws Exception {

    XQSequence result = executeQuery();

    if (result.next()) {
      XQItem item = result.getItem();
      ByteArrayOutputStream bao = new ByteArrayOutputStream();
      item.writeItem(bao, null);
      String s = bao.toString("UTF-8");
      assertTrue(s.contains("47"));
    } else {
      fail("should always produce a result");
    }

  }

  @Test
  void itShouldStreamResult() throws Exception {

    XQSequence result = executeQuery();

    if (result.next()) {
      XQItem item = result.getItem();
      XMLStreamReader streamReader = item.getItemAsStream();
      StringWriter stringWriter = new StringWriter();
      XTF.newTransformer().transform(new StAXSource(streamReader), new StreamResult(stringWriter));
      String s = stringWriter.toString();
      assertTrue(s.contains("47"));
    } else {
      fail("should always produce a result");
    }

  }

}

test.xq

<test id="47"/>