Why is A not vertically centered in the cell?

Question

I had a simple example that worked well but since reinstalling MikTeX, I can't center A in the middle of the cell anymore

\newcolumntype{C}{ >{\centering\arraybackslash} m{0.5\textwidth} }

\begin{tabular}{|C|}
    \hline
    A\\[50pt]
    \hline
\end{tabular}

And a MWE more complete :

\documentclass[10pt,a4paper]{article}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{array}

\begin{document}
\newcolumntype{C}{ >{\centering\arraybackslash} m{0.45\textwidth} }
\newcolumntype{D}{ >{\centering\arraybackslash} m{0.45\textwidth} }

\begin{tabular}{|C|D|@{}m{0pt}@{}}
    \hline
    A & B & \\[10pt]
    \hline
    \begin{itemize}
        \item bla
        \item bla
        \item bla
    \end{itemize} &
    \begin{tabular}{cc}
        a & b \\
        c & d \\
        e & f 
    \end{tabular}
 \\ \hline
\end{tabular}
\end{document}

Something has changed or am I making a mistake somewhere? Thanks in advance.

Answer 1

I would reformat your table in the following (however, I'm not sure, what you like to have):

\documentclass[10pt,a4paper]{article}
\usepackage{enumitem}  
\usepackage{ragged2e}                           % <---
\usepackage{array, makecell}
\renewcommand\theadfont{\normalsize\bfseries}   % <---
\newcolumntype{L}[1]{ >{\csname @minipagetrue\endcsname% <---
                        \RaggedRight\hspace{0pt}}m{#1} } 

\begin{document}
    \begin{table}[ht]
    \centering
    \setlist[itemize]{nosep,                    % <--- list setup
                      leftmargin=*,
                      label=\textbullet,    
                      before=\vspace{-0.6\baselineskip},
                      after =\vspace{-0.6\baselineskip}
                      }
\begin{tabular}{| L{0.45\linewidth} | L{0.45\linewidth}|}
    \hline
\thead{A}       &   \thead{B}   \\
    \hline
\begin{itemize}
    \item bla
    \item bla
    \item bla
\end{itemize}   &   \vspace{-0.6\baselineskip}% <---
                    \begin{tabular}{@{} cc @{}}
                a & b \\
                c & d \\
                e & f
                    \end{tabular}   \\ 
    \hline
\end{tabular}
    \end{table}
\end{document}

Answer 2

Quick and dirty trick:

\documentclass[10pt,a4paper]{article}
\usepackage{array,xcolor}
\begin{document}
\color{gray!50}
1

2

3 --- --- --- --- ---> 

4

5
\color{black}

\vspace{-5\baselineskip}

\newcolumntype{C}{ >{\centering\arraybackslash}m{0.45\textwidth}}
\begin{tabular}{|C|C|}
\hline
\rule[-25.5pt]{0em}{60pt}  A & \rule[-25.5pt]{0em}{60pt} B \\
\hline
\begin{itemize}
        \item bla
        \item bla
        \item bla
\end{itemize} & \renewcommand\arraystretch{1}
\begin{tabular}{cc}
        a & b \\
        c & d \\
        e & f 
\end{tabular} \\ \hline
\end{tabular}
\end{document}