Shortcodes not parsing for HTML content files with manual summary dividers

[drElektron]

What version of Hugo are you using (hugo version)?

$ hugo version
Hugo Static Site Generator v0.80.0-792EF0F4 windows/amd64 BuildDate: 2020-12-31T13:37:57Z

Does this issue reproduce with the latest release?

Yes and with v0.67.1

Description

TL;DR = Shortcodes won't parse for HTML content files that have a manual summary divider

Longer description in this discourse. Issue raised as per request.
This works:

<p>Some introduction words</p>
<p>Some main content words</p>
{{<a-custom-shortcode with=a-variable>}}
<p>Some other main content words</p>

This doesn't

<p>Some introduction words</p>
<!--more-->
<p>Some main content words</p>
{{<a-custom-shortcode with=a-variable>}}
<p>Some other main content words</p>

Demo repo for this behaviour is here

There is also another possible issue that is highlighted by this example - .Summary and .Content give different things for MD and HTML content files (although maybe that is intentional?).

[jmooring]

Use <!-- more --> instead of <!--more-->.

Yes, there's a problem here somewhere, because the documentation states:

> Be careful to enter <!--more--> exactly; i.e., all lowercase and with no whitespace.

Disregard. Poor testing.

[jmooring]

Duplicate of #6513.

[jmooring]

There is also another possible issue that is highlighted by this example - .Summary and .Content give different things for MD and HTML content files

This is described in #6686.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.