List page having blank cards in the article card array

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Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate.
• Provided a clear description of your suggestion.
• Included any relevant context or examples.

Issue or Suggestion Description

The article card array has gaps as shown in the screenshot:

Issue analysis

Obviously, the blank cards appear in front of the article cards that have links in content summaries:

• Heading titles, such as # Introduction
• Links to another page, such as Espressif’s Secure Manufacturing Service

Hugo version

This issue appeared after upgrading Hugo v0.120.4 to v0.135.0.

Proposed fixes

• Avoid adding heading titles right after front matter
• Avoid adding links in the first paragraph
• If links or heading title are needed at the beginning of an article, add a manual summary or front matter summary (for details, see the content summaries link above)

Follow-up actions

Suggest applying the proposed fixes to all problematic articles.