Abstract causes font size to shrink in paragraphs with margins and without footnotes about abstract-section HOT 1 CLOSED

There is a slight misunderstanding in how the filter works: some abstracts do contain headings, so everything up to the next top-level heading is included in the abstract. The result of applying the filter is equivalent to

---
abstract: |
  # Abstract

  This is an abstract

  ## A title

  Here is some text without a footnote

  Here is some text with a footnote^[Look, a footnote]
---

Use a horizontal rule if you want the abstract to end before the next level 1 heading:

# Abstract

This is an abstract

* * * * *

## A title

Here is some text without a footnote

Here is some text with a footnote^[Look, a footnote]

The font/footnote issue is weird, but unrelated to this filter. I suggest to report it in quarto-cli.

from abstract-section.