I am using proofread package to correct a latex document (see the MWE and its output). When I delete text using \del{} command which spans more than a line in the output (PDF) it fails to start a new line (see the attached image). Thanks in advance for your help. Below is the MWE and its output:

    \documentclass[reprint,amsmath]{revtex4-1}

\usepackage{color}
\usepackage{amsmath}
\usepackage[utf8]{inputenc}

\begin{document}

\affiliation{Koocha e Janaan, Shehr Dilbar}

\maketitle
\section{Introduction}

Baseline datasets are also rare, making trend gathering difficult.
\del{Increasingly, researchers are working with Inuit communities,
which have a long oral history of species in the region.}

In recent years, killer whales, or orcas, have also become more
frequent in a number, taking advantage of longer ice-free seasons.
The whales, which feast on resident narwhal, have even started
changing narwhal behaviour, according to a 2017 report by the
Department of Fisheries and Oceans. (Report from The Guardian)

\end{document}


• It seems to fail to break lines no matter what document class one is using. – egreg Nov 6 '18 at 7:54

The problem here is that commands from the soul package may not be nested; the combined overstriking and highlighting in the \del command of the proofread package is therefore done by overstriked the text in a savebox and then highlight that box. However, this forces the text on a single line. I'll upload a new version with the overstriking removed:
\newcommand{\del}[1]{%