This is the LaTex code:
\begin{figure}
\centering
\includegraphics[width=80mm]{PLA.pdf}
\caption{Some figure}
\end{figure}
When I change the width to 80 it causes the problem but when I change the width to something like 55, there will be no problem.
The spaces are depicted in the picture:

\documentclass{...}and ending with\end{document}. – BambOo Sep 02 '19 at 15:16