Hi,
this code works perfectly in P. 0.42 and returns a list of featured posts into a HTML section:
<section>
{{#getPostsByTags (concatenate "count=50&tag_as=id&allowed=featured&orderby=" @config.custom.landingOrderBy "&ordering=" @config.custom.landingOrdering)}}
{{> landing}}
{{/getPostsByTags}}
</section>
In P. 0.43 the result are an empty HTML section.
To update the website I was forced to downgrade 🙁