方程式导致段落文本与标题文本重叠（picinpar）

Question

为什么皮辛帕尔每当我在段落中放入方程式时，段落文本是否会与图表标题重叠？

\documentclass[a4paper,10pt]{book}

\usepackage{graphics}
\usepackage{graphicx}
\usepackage{picinpar}
\usepackage{lipsum}
\usepackage[T1]{fontenc}

\usepackage{amsmath}
\usepackage{siunitx}

\begin{document}

\lipsum[75]

\begin{figwindow}[3,l,\includegraphics[width=5cm]{example-image-a}, {Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.} \label{fig:example-image-a}]
Blabla

\begin{equation}
 \begin{split}
   5 m + 2 m                    & = (5+2) m         = 7 m \\
   5{\times}4 + 2{\times}4      & = (5+2){\times}4  = 28 \\
   5 x + 2 x    & = (5+2) x         = 7 x \\
 \end{split}
\end{equation}

Blabla

\begin{equation}
 \begin{split}
   5 m + 2 m                    & = (5+2) m         = 7 m \\
   5{\times}4 + 2{\times}4      & = (5+2){\times}4  = 28 \\
   5 x + 2 x    & = (5+2) x         = 7 x \\
 \end{split}
\end{equation}

Blabla

\begin{equation}
 \begin{split}
   5 m + 2 m                    & = (5+2) m         = 7 m \\
   5{\times}4 + 2{\times}4      & = (5+2){\times}4  = 28 \\
   5 x + 2 x    & = (5+2) x         = 7 x \\
 \end{split}
\end{equation}

Blabla

\begin{equation}
 \begin{split}
   5 m + 2 m                    & = (5+2) m         = 7 m \\
   5{\times}4 + 2{\times}4      & = (5+2){\times}4  = 28 \\
   5 x + 2 x    & = (5+2) x         = 7 x \\
 \end{split}
\end{equation}

Blabla

\begin{equation}
 \begin{split}
   5 m + 2 m                    & = (5+2) m         = 7 m \\
   5{\times}4 + 2{\times}4      & = (5+2){\times}4  = 28 \\
   5 x + 2 x    & = (5+2) x         = 7 x \\
 \end{split}
\end{equation}

\end{figwindow}

\lipsum[75]

\end{document}

编辑：

我正在使用 Overleaf。

编辑：

这是我的真实文档的样子：

编辑：

这是删除公式前的空行后的结果。