SiteMapItemTag does not work with preferItemId

instead of

siteMapItem = hstRequest.getRequestContext().getResolvedSiteMapItem().getHstSiteMapItem().getHstSiteMap().getSiteMapItemById(preferItemId);

which looks up only child sitemap items by id (internal hst model)

it should look up the siteMapItem by

siteMapItem = hstRequest.getRequestContext().getResolvedSiteMapItem().getHstSiteMapItem().getHstSiteMap().getSiteMapItemByRefId(preferItemId);

Thanks Mike for reporting the issue!