Left matrix bracket not rendered properly

Question

I am trying to add matrices to an existing document, here is the Github page of the original document and here is the rendered version. However, when I add matrices on every other row the left bracket of the matrix is not rendered. This is the result:

I have tried displaying the brackets in multiple ways however the result always stays the same. This is the current code which I have used:

Transpose \newline 
    \( \begin{bmatrix}
        a & b \\
        c & d \\
        e & f
    \end{bmatrix}^T \) & 
    \smallskip
    \( \begin{bmatrix}
        a & c & e \\
        b & d & f
    \end{bmatrix} \) \\

    Adjoint \newline    
    \( \begin{bmatrix}
        a & b \\
        c & d \\
        e & f
    \end{bmatrix}^\dagger \) & 
    \smallskip
    \( \begin{bmatrix}
        \overline{a} & \overline{c} & \overline{e} \\
        \overline{b} & \overline{d} & \overline{f}
    \end{bmatrix} \) \\

I do not see why this is not rendered properly, especially because it does not happen every row.

Thank you in advance for any help.

EDIT

Completely working document

% Copyright (c) Microsoft Corporation. All rights reserved.
% Licensed under the MIT License.

%!TEX program=xelatex
% This cheatsheet is based on the template
% provided at https://gist.github.com/alexander-yakushev/c773543bf9a957749f79.
\documentclass[10pt,english,landscape]{article}
\usepackage{multicol}
\usepackage{calc}
\usepackage[landscape]{geometry}
\usepackage{color,graphicx,overpic}

% https://tex.stackexchange.com/a/192067
\usepackage{fontawesome}
  \newfontfamily{\FA}{[FontAwesome.otf]}

% Known issue in {fontspec}: https://github.com/wspr/fontspec/issues/312#issuecomment-342125206
% Since {fontspec} is included only when compiling with XeTeX, we guard
% our fix accordingly.
\usepackage{ifxetex}
    \ifxetex
        \let\latinencoding\relax
        \usepackage{fontspec}
        \setmainfont{Segoe UI}
        \setmonofont{Consolas}
    \fi

% \usepackage[T1]{fontenc}
% \usepackage[bitstream-charter]{mathdesign}
\usepackage[utf8]{inputenc}
\usepackage{url}
\usepackage{amsfonts}
\usepackage{array,booktabs}
\usepackage{textcomp}
\usepackage[usenames,dvipsnames,table]{xcolor}
\usepackage[most]{tcolorbox}
\usepackage{menukeys}
\usepackage{tabularx}
\usepackage{multirow}
\usepackage{colortbl}
\usepackage{tikz}
\usepackage{environ}
\usepackage{braket}

\usetikzlibrary{calc}
\pgfdeclarelayer{background}
\pgfdeclarelayer{foreground}
\pgfsetlayers{background,main,foreground}

\geometry{top=1cm,left=1cm,right=1cm,bottom=1cm}

\pagestyle{empty} % Turn off header and footer

% \renewcommand\rmdefault{phv} % Arial
% \renewcommand\sfdefault{phv} % Arial

% Redefine section commands to use less space
\makeatletter
\renewcommand{\section}{\@startsection{section}{1}{0mm}%
  {-1ex plus -.5ex minus -.2ex}%
  {0.5ex plus .2ex}%x
  {\normalfont\large\bfseries}}
\renewcommand{\subsection}{\@startsection{subsection}{2}{0mm}%
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  {0.5ex plus .2ex}%
  {\normalfont\normalsize\bfseries}}
\renewcommand{\subsubsection}{\@startsection{subsubsection}{3}{0mm}%
  {-1ex plus -.5ex minus -.2ex}%
  {1ex plus .2ex}%
  {\normalfont\small\bfseries}}
\makeatother

\setcounter{secnumdepth}{0} % Don't print section numbers
\setlength{\parindent}{0pt}
\setlength{\parskip}{0pt plus 0.5ex}

\definecolor{TableHead}{rgb}{0.353, 0.329, 0.667}
\definecolor{TableRow}{rgb}{0.816, 0.812, 0.902}

\NewEnviron{keysref}[1]{
  % \begin{center}
  \smallskip
  \begin{tikzpicture}
      \rowcolors{1}{}{TableRow}

      \node (tbl) [inner sep=0pt] {
        \begin{tabular}{p{2.5cm}p{5.05cm}}
          \rowcolor{TableHead}
          \multicolumn{2}{l}{\normalsize\textbf{\color{white}{#1}}}\parbox{0pt}{\rule{0pt}{0.3ex+\baselineskip}}\\
          \BODY
          \arrayrulecolor{TableHead}\specialrule{.17em}{0em}{.2em}
        \end{tabular}};
      \begin{pgfonlayer}{background}
        \draw[rounded corners=2pt,top color=TableHead,bottom color=TableHead, draw=white]
        ($(tbl.north west)-(0,-0.05)$) rectangle ($(tbl.north east)-(0.0,0.15)$);
        \draw[rounded corners=2pt,top color=TableHead,bottom color=TableHead, draw=white]
        ($(tbl.south west)-(0.0,-0.11)$) rectangle ($(tbl.south east)-(-0.0,-0.02)$);
      \end{pgfonlayer}
    \end{tikzpicture}
  % \end{center}
}

% https://tex.stackexchange.com/a/102523
\newcommand{\forceindent}[1]{\leavevmode{\parindent=#1\indent}}

%% CUSTOM NOTATION %%

\newcommand{\qs}{Q\#}
\newcommand{\unixlike}{\hfill\faApple\faLinux}
\newcommand{\ctrllike}{\hfill\faWindows\faLinux}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\raggedright\

\Large{\qs~0.10 Language Quick Reference}

\footnotesize
\begin{multicols}{3}



  \begin{keysref}{Linear Algebra}
    Transpose \newline 
    \( \begin{bmatrix}
        a & b \\
        c & d \\
        e & f
    \end{bmatrix}^T \) & 
    \smallskip
    \( \begin{bmatrix}
        a & c & e \\
        b & d & f
    \end{bmatrix} \) \\

    Adjoint \newline    
    \( \begin{bmatrix}
        a & b \\
        c & d \\
        e & f
    \end{bmatrix}^\dagger \) & 
    \smallskip
    \( \begin{bmatrix}
        \overline{a} & \overline{c} & \overline{e} \\
        \overline{b} & \overline{d} & \overline{f}
    \end{bmatrix} \) \\
  \end{keysref}

\end{multicols}

\end{document} 

Answer 1

I think this is some kind of clash between whatever wizardry xcolor does for the \rowcolors macro, and the double typesetting that amsmath uses (first pass measures and second generates the output if I remember correctly). Here is a minimal example that illustrates the problem:

\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{amsmath}
\begin{document}
\rowcolors{1}{}{cyan}
\begin{tabular}{c}
AAA\\
\( \begin{bmatrix}                                                                                                                                            
a & b \\                                                                                                                                                      
c & d                                                                                                                                                         
\end{bmatrix} \)                                                                                                                                              
\end{tabular}
\end{document}

And here is a hack to get around it:

\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{amsmath}
\newbox\matrixbox
\sbox\matrixbox{\( \begin{bmatrix}
a & b \\
c & d
\end{bmatrix} \)}
\begin{document}
\rowcolors{1}{}{cyan}
\begin{tabular}{c}
AAA\\
\usebox\matrixbox
\end{tabular}
\end{document}

The point here is that the problem goes away if the matrix is typeset before attempting to create the table. I'm 99% certain a better method exists, but at the moment I don't know what it is.