Tabularray +pmatrix not working in align

Question

It seems that the tabularray environment +pmatrix does not work with align environments. Is there a fix or something I am missing?

MWE:

\documentclass{scrartcl}
\usepackage{tabularray}
\UseTblrLibrary{amsmath}

\begin{document}
\begin{align}
    a + b 
    \begin{+pmatrix}
        a & a \\
        b & a \\
    \end{+pmatrix}
\end{align}
\end{document}

Error:
Argument of \+pmatrix has an extra }.
<inserted text> 
\par 
l.21 \end{align}

Answer 1

It's a small problem with tblr used in math mode which was, in fact, corrected with today's version of tabularray (version 2022B).

Either wait for the new version to propagate through the servers, or enclose the pmatrix environment in braces:

\documentclass{scrartcl}
\usepackage{tabularray}
\UseTblrLibrary{amsmath}

\begin{document}
\begin{align}
    a + b 
    {
    \begin{+pmatrix}
        a & a \\
        b & a \\
    \end{+pmatrix}
    }
\end{align}
\end{document}

I'm actually eagerly waiting for the new version to reach my TeX Live mirror!