Space below the box in mdframed package doesn't appear

Question

I am using the mdframed package along with the options skipabove and skipbelow and although the vertical space above the box is appearing, as it should, the space below does't appear! What am I doing wrong and it doesn't appear? How should I fix it?

As an extra question why when I use the parskip package instead of adding vertical space above and below it does the exact opposite?

MWE

\documentclass{article}

\usepackage{mdframed}

\begin{document}

Text above

\begin{mdframed}[skipabove=2cm, skipbelow=2cm]

Text in box

\end{mdframed}

Text below

\end{document}

Answer 1

If you want to try with tcolorbox, it seems that before skip and after skip work as expected.

\documentclass{article}

\usepackage{tcolorbox}

\begin{document}

Text above

\begin{tcolorbox}[before skip=2cm, after skip=2cm]

Text in box

\end{tcolorbox}

Text below

\end{document}

Update: more minimalistic

If `more minimalistic` means a box like the one shown in question, it's not too difficult to get a similar one with `tcolorbox`

\documentclass{article}

\usepackage{tcolorbox}

\newtcolorbox{minimal}{%
    sharp corners, colback=white, colframe=black, notitle,
    before skip=2cm, after skip=2cm}

\begin{document}

Text above

\begin{minimal}

Text in box

\end{minimal}

Text below

\end{document}