निरंजन
Question title says it all, MWE:


\documentclass{article}
\usepackage{lipsum}
\usepackage{mdframed}

\begin{document}
\begin{mdframed}
\lipsum
\begin{mdframed}
\lipsum
\begin{mdframed}
\lipsum
\end{mdframed}
\end{mdframed}
\end{mdframed}
\end{document}


Why suddenly does the page-breaking stop?

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