Misunderstanding of shortcode syntax in 0.55

Let’s say you have a markdownify shortcode.

Usecase 1

markdownify.html:

## Heading

{{ .Inner | markdownify }}

The | markdownify part is important now!

{{< markdownify >}}
Paragraph.
{{< /markdownify >}}

Usecase 1 renders your paragraph to HTML—but not the heading in your shortcode file itself.

Usecase 2

markdownify.html:

## Heading

{{ .Inner }}

You do not need markdownify here.

{{% markdownify %}}
Paragraph.
{{% /markdownify %}}

In usecase 2 the heading will be sent to the content renderer—that is it will be rendered to HTML and e.g. part of the TOC.