Unexpected behavior when setting baseline in a +bmatrix

[swarn]

I have a +bmatrix inside a tblr. As expected, the default baseline is in the middle:

When I set the baseline of the matrix, the text aligns, but the brackets do not:

The nicematrix package shows my expected behavior:

That works, but I enjoy tabularray and would be happier not to add another package. Code for all examples is below. Am I missing something?

Minimum working example

\documentclass{article}
\usepackage{amsmath,tabularray}
\usepackage{nicematrix}
\UseTblrLibrary{amsmath}

\begin{document}

\begin{tblr} { colspec={l c X[l]} }
    a &
    $\begin{+bmatrix}
        x \\ y \\ z
    \end{+bmatrix}$ &
    Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy
    eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam
    voluptua. \\
    b & $t$ \\
    c & $i$ & Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed
    diam nonumy eirmod tempor invidunt. \\
\end{tblr}

\vspace{1in}

\begin{tblr} { colspec={l c X[l]} }
    a &
    $\begin{+bmatrix}[baseline=t]
        x \\ y \\ z
    \end{+bmatrix}$ &
    Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy
    eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam
    voluptua. \\
    b & $t$ \\
    c & $i$ & Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed
    diam nonumy eirmod tempor invidunt. \\
\end{tblr}

\vspace{1in}

% Nicematrix version
\begin{tblr} { colspec={l c X[l]} }
    a &
    $\begin{bNiceMatrix}[baseline=t]
        x \\ y \\ z
    \end{bNiceMatrix}$ &
    Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy
    eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam
    voluptua. \\
    b & $t$ \\
    c & $i$ & Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed
    diam nonumy eirmod tempor invidunt. \\
\end{tblr}

\end{document}

[lvjr]

It is a bug and I have created an issue for it.

As well as nicematrix package, you can use delarray package at this time.

[swarn]

Ah, thanks much for taking a look. I subscribed to the issue.