Footnote number is not shown when \footnotetext is placed inside mdframed

Question

I want to place several footnotes inside a mdframed environment like this

\documentclass{article}
\usepackage{mdframed}

\begin{document}

First\footnote{first footnote}

\begin{mdframed}
Second\footnotemark
\footnotetext{Second footnote}
Third\footnotemark
\footnotetext{Third footnote}
\end{mdframed}

\end{document}

But the footnote numbers are not shown

If I bring the \footnotetexts outside of mdframed, the numbers would be shown at the end of the page. But of course, this would prevent me from having multiple footnotes inside the box.

Answer 1

Adding this to the preamble seems to do the trick

\let\thempfootnote\thefootnote