Difference in size of MathJax with LaTeX in `\scriptstyle\underbrace{X}`

[hbghlyj]

Issue Summary

I noticed a difference of MathJax with LaTeX in handling the code \scriptstyle\underbrace{X}.

Steps to Reproduce:

1. In LaTeX it is of normal size (the first X is for comparison):
2. In MathJax $X\scriptstyle\underbrace{X}$ it is of script size:

Technical details:

• MathJax Version: 3.2

[hbghlyj]

Similar:

$X\scriptstyle\begin{matrix}X\end{matrix}$

LaTeX:

MathJax:

[dpvc]

OK, it looks like under- and overbrace are outliers among the under- and over- macros, as they do seem to reset the style to text-style. I will look into fixing that.

Similarly, the matrix and array environments do seem to reset to text-style as well.