`MathJax.InputJax.TeX` sometimes will not be defined

Issue Summary

Might be related to https://github.com/mathjax/MathJax/pull/1464, but this issue caused by MathJax.InputJax.TeX sometimes will not be defined.

Steps to Reproduce:

<script src="//cdn.jsdelivr.net/npm/mathjax@2/MathJax.js?config=TeX-AMS_CHTML"></script>
<script>MathJax.InputJax.TeX.resetEquationNumbers</script>

Refresh page repeatedly until error occur

Technical details:

• MathJax Version: 2.7.9
• Client OS: Windows 10
• Browser: Firefox 105

I am using the following MathJax configuration: DEFAULT CONFIGURATION