nuxeo-dropzone not managing xpath attribute properly for complex types

Steps to reprodude:

• Create schema called repeatAndCompare wit a complex field inside:
  • repeatAndCompare (Schema)
    • actor (Complex)
      • image (Blob)
• Use a nuxeo-dropzone web element to upload a file to the blob field in your view:

    <nuxeo-dropzone role="widget"
                    label="[[i18n('label.form.actorImage')]]"
                    document="{{document}}"
                    xpath="repeatAndCompare:actor/image">
    </nuxeo-dropzone>

Using repeatAndCompare:actor/image as xpath in the nuxeo-dropzone, it fails with an error in the user interface:

documentCreationForm.createError

NOTE: Also tested with repeatAndCompare:actor.image (using a '.' instead of '/'). It doesn'f fail, but it's not uploading the file.