`\intertext` output wrong when mathtools loaded

[mbertucci47]

When mathtools is loaded, the vertical spacing of \intertext is wrong.

\DocumentMetadata
  {
    lang=en-US,
    pdfversion=2.0,
    pdfstandard=ua-2,
    tagging=on, % toggle this
  }
\documentclass{article}
\usepackage{mathtools} % toggle this
\usepackage{unicode-math}

\begin{document}

\begin{align}
A&=B
\intertext{normal intertext}
E&= F
\end{align}

\end{document}

PDF with mathtools and tagging

PDF with tagging and no mathtools

(almost the same as mathtools with no tagging; that difference is acceptable/expected)

The spacing of \shortintertext seems okay.

[mbertucci47]

I think the issue is that in the patch of \MT_intertext: in latex-lab-mathtools, the line

\penalty\postdisplaypenalty\vskip\belowdisplayskip

got changed to

\penalty\postdisplaypenalty\vskip-\belowdisplayskip

Switching it back seems to fix the issue.

[mbertucci47]

It looks like the sign was changed in latex3/latex2e@0bc666d for both the amsmath and mathtools files and changed back for amsmath in latex3/latex2e@7bc038c but the mathtools definition was never changed back.