How to prevent pagebreak between section/subsection title

Question

How to prevent pagebreaks between section/subsection titles and the multicolumn content of the document when using the paracol environment like this...

\renewcommand{\deutschertitel}{Dezimalsystem}
\renewcommand{\englischertitel}{Decimal System}

\subsection[\englischertitel]{}

\begin{paracol}{2}[]

\subsection*{\englischertitel}

\switchcolumn

\subsection*{\deutschertitel}

\switchcolumn*

The decimal system uses...

\switchcolumn

Das Dezimalsystem verwendet...

\end{paracol}

Here is one example that shows a page break where it should not happen:

Another example that shows a page break where it should not happen:

Update (2019-01-23):

Added a better source code example and some screenshots that show the issue.

Answer 1

The solution that worked for me very well is using \Needspace which is described here very well. A \Needspace{1.9cm} before every \section command and a \Needspace{2.2cm} before every \subsection command fixed the issue for me without the need of inserting any \pagebreaks.