MML overline too high in MathJax 4.0.0-alpha.1

Issue Summary

An MML overline ‾ is too high in MathJax 4.0.0-alpha.1

Steps to Reproduce:

1. Go to https://codepen.io/alexedgcomb/pen/ZEMKELP

Observed: Overline is too high over the s

Expected: Overline closer to the s, like in MathJax 3.2.2 https://codepen.io/alexedgcomb/pen/abaWvLz

Technical details:

• MathJax 4.0.0-alpha.1
• MacOS 13.2
• Browser: Firefox 110

I am not using a MathJax configuration and loading MathJax via

<script src="https://cdn.jsdelivr.net/npm/mathjax-full@4.0.0-alpha.1/es5/mml-svg.min.js"></script>

Supporting information:

Issue present across OS/browsers, and for both SVG and CHTML output.

Issues not present in LaTeX overline in MathJax 4.0.0-alpha.1 https://codepen.io/alexedgcomb/pen/ExemVoa

So, perhaps is an MML input issue.