Problema de espacio en Titlesec

Question

\documentclass[11pt,]{article}
\usepackage{titlesec}
\titleformat{\section}[leftmargin]{\normalfont
\titlerule*[.6em]{\bfseries.}%
\vspace{6pt}%
\sffamily\bfseries\filleft}
{\thesection}{.5em}{}
\titlespacing{\section}
{8pc}{1.5ex plus .1ex minus .2ex}{1pc}
\begin{document}

\section{This is a section heading}
\begin{enumerate}
\item This is the first item and it is too low on the page...
\item This is another item
\item This is another item
\item This is another item
\item This is another item
\item This is another item
\item This is another item
\end{enumerate}
\section{This is a section heading}

This paragraph is fine ...
\end{document}

¿Por qué obtengo espacio vertical adicional antes de una lista pero no antes de un párrafo?

Answer 1

Simplemente agregue este código entre \section{…}y su listasin agregar líneas en blanco:

...
\section{This is a section heading}
\leavevmode\vspace*{-\dimexpr\baselineskip+\topsep\relax}
\begin{enumerate}
...