Header is duplicated in body when converting from html

[Koi7]

Hi. I'm trying to create docx from html. Header is also created from html string. So when I add header it works fine but it's content is duplicated in body part. I use docx4j-ImportXHTML to convert html into elements.

My pom.xml
`
org.docx4j
docx4j-JAXB-Internal
8.3.1

    <dependency>
        <groupId>org.docx4j</groupId>
        <artifactId>docx4j-ImportXHTML</artifactId>
        <version>8.2.1</version>
    </dependency>`

My java code:
`import org.apache.commons.io.FileUtils;
import org.docx4j.Docx4J;
import org.docx4j.convert.in.xhtml.XHTMLImporter;
import org.docx4j.convert.in.xhtml.XHTMLImporterImpl;
import org.docx4j.model.structure.SectionWrapper;
import org.docx4j.openpackaging.exceptions.InvalidFormatException;
import org.docx4j.openpackaging.packages.WordprocessingMLPackage;
import org.docx4j.openpackaging.parts.Part;
import org.docx4j.openpackaging.parts.WordprocessingML.HeaderPart;
import org.docx4j.openpackaging.parts.WordprocessingML.MainDocumentPart;
import org.docx4j.relationships.Relationship;
import org.docx4j.wml.*;

import java.io.File;
import java.util.List;

public class DuplicatedHeaderInBodyExample {
private static ObjectFactory objectFactory = new ObjectFactory();

public static void main(String[] args) throws Exception {

    WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage
            .createPackage();
    // Delete the Styles part, since it clutters up our output
    MainDocumentPart mdp = wordMLPackage.getMainDocumentPart();
    Relationship styleRel = mdp.getStyleDefinitionsPart().getSourceRelationships().get(0);
    mdp.getRelationshipsPart().removeRelationship(styleRel);
    XHTMLImporter xhtmlImporter = new XHTMLImporterImpl(wordMLPackage);
    xhtmlImporter.setHyperlinkStyle("Hyperlink");

    // OK, the guts of this sample:
    // The 2 things you need:
    // 1. the Header part
    Relationship relationship = createHeaderPart(wordMLPackage, xhtmlImporter);
    // 2. an entry in SectPr
    createHeaderReference(wordMLPackage, relationship);

    String bodyHtml = FileUtils.readFileToString(new File("src/main/main.html"));
    mdp.getContent().addAll(xhtmlImporter.convert(bodyHtml, null));

    Docx4J.save(wordMLPackage, new File("C:\\Users\\user\\Documents\\html to docx results\\OUT_HeaderFooterCreate.docx") );
}

public static Relationship createHeaderPart(
        WordprocessingMLPackage wordprocessingMLPackage, XHTMLImporter xhtmlImporter)
        throws Exception {

    HeaderPart headerPart = new HeaderPart();
    Relationship rel =  wordprocessingMLPackage.getMainDocumentPart()
            .addTargetPart(headerPart);

    // After addTargetPart, so image can be added properly
    headerPart.setJaxbElement(getHdr(wordprocessingMLPackage, xhtmlImporter));

    return rel;
}

public static void createHeaderReference(
        WordprocessingMLPackage wordprocessingMLPackage,
        Relationship relationship )
        throws InvalidFormatException {

    List<SectionWrapper> sections = wordprocessingMLPackage.getDocumentModel().getSections();

    SectPr sectPr = sections.get(sections.size() - 1).getSectPr();
    // There is always a section wrapper, but it might not contain a sectPr
    if (sectPr==null ) {
        sectPr = objectFactory.createSectPr();
        wordprocessingMLPackage.getMainDocumentPart().addObject(sectPr);
        sections.get(sections.size() - 1).setSectPr(sectPr);
    }

    HeaderReference headerReference = objectFactory.createHeaderReference();
    headerReference.setId(relationship.getId());
    headerReference.setType(HdrFtrRef.DEFAULT);
    sectPr.getEGHdrFtrReferences().add(headerReference);// add header or
    // footer references

}

public static Hdr getHdr(WordprocessingMLPackage wordprocessingMLPackage, XHTMLImporter xhtmlImporter)
        throws Exception {

    Hdr hdr = objectFactory.createHdr();

    File file = new File("src/main/header.html");
    String readFileToString = FileUtils.readFileToString(file);

    hdr.getContent().addAll(xhtmlImporter.convert(readFileToString, null));
    return hdr;

}

}
`

My main.html:
<p>BODY CONTENT</p>

My header.html:
<p>HEADER</p>

THE RESULTIN DOCX SCREENSHOT ATTACHED AS SCREENSHOT

As you can see on the screenshot. Header content is added twice: as header and as content in body. I want header by added only as header without duplicating it in body. Can you guys suggest any fix or workaround please?

[Koi7]

resulting docx attached
OUT_HeaderFooterCreate.docx