minipage inside tabular leads to faulty structure

[u-fischer]

\DocumentMetadata{testphase={phase-III,table}}

\documentclass[]{article}

\begin{document}

\begin{tabular}{p{6cm}}
\begin{itemize}\item blub\end{itemize}
\end{tabular}

% faulty structure, minipage outside TD
\begin{tabular}{l}
 \begin{minipage}{6cm}
   abc 
 \end{minipage}
\end{tabular}

% faulty structure, errors
\begin{tabular}{l}
 \begin{minipage}{6cm}
   \begin{itemize}\item blub\end{itemize}
 \end{minipage}
\end{tabular}

\end{document}