Inconsistent matrix parentheses size

[efaulhaber]

The size of pmatrix parentheses is very inconsistent both using XeLaTeX and pdfLaTeX. The size of the parentheses in the right matrix looks like it should be, whereas the size of the parentheses in the left matrix looks way to big. This picture was produced with the following code.

\documentclass[11pt]{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}

\usepackage{stix2}
%\linespread{1.02}

\begin{document}
    \begin{equation}
        \begin{pmatrix}
            0 & 0 & 0 \\
            0 & 0 & 0 \\
            0 & 0 & 0 \\
            0 & 0 & 0 \\
            0 & 0 & 0
        \end{pmatrix}
        \begin{pmatrix}
            0 & 0 & 0 \\
            0 & 0 & 0 \\
            0 & 0 & 0 \\
            0 & 0 & 0
        \end{pmatrix}
    \end{equation}
\end{document}

Using XeLaTeX I get different sizes but still very inconsistent.

[tiroj]

@davidmjones Any font action required to address this?

[efaulhaber]

Is there any news on this by now?

[tiroj]

I’ve not assigned it to a milestone because it isn’t yet clear to me whether this is something that can be addressed at the font level. We have found some issues that are specific to particular flavours of –TeX, and sorting those out from generalised font bugs that affect all environments is something for which I rely on @davidmjones and others.