I already installed v2.1.1 on our dev site and it happens the same.
It doesn’t appear on the website when there is no stock and at the modules position, it appears like that (see images). It is added to displayProductAdditionalInfo hook
Hi,
There was some code lost in the /themes/transformer/templates/catalog/_partials/product-additional-info.tpl file, I fixed it for you.
Best regards.