page break inside `addmargin*' environment

Package scrextend Warning: page break inside `addmargin*' environment.
(scrextend)                A `addmargin*' environment starting on page \tpo@0 
(scrextend)                ends on page 1.
(scrextend)                This will result in potential wrong margins on
(scrextend)                every other page.
(scrextend)                So maybe you should change the `addmargin*'
(scrextend)                environment, that ends on input line 6.

\documentclass{article}
\usepackage{scrextend}
\begin{document}
\begin{addmargin*}[0pt]{-10em}
	\rule{\linewidth}{2ex}
\end{addmargin*}
\end{document}