it doesn't work in 2 cases.

[SnailDove]

1. nested matrix

$\Omega^TA\Omega=\begin{pmatrix}\begin{pmatrix}a_1&b_1 \\ -b_1&a_1\end{pmatrix}\\&\ddots\\&&\begin{pmatrix}a_s&b_s \\ -b_s&a_s\end{pmatrix}\\&&&\lambda_{2s+1}\\&&&&\ddots\\&&&&&\lambda_n\end{pmatrix}$

2. * in matrix

$\begin{pmatrix}a&*\\0&b\end{pmatrix}$

[MakerGYT]

I also have this problem, Need to use four backslashes to escape newlines. You can try markdown-it-latex2img

[SnailDove]

I also have this problem, Need to use four backslashes to escape newlines. You can try markdown-it-latex2img

Thx, it deserves a try!