<div dir="ltr">This is irrelevant to bidi and it is one of polyglossia's font issues where it is unable to do proper font handling. To fix this you can have this before \begin{document}:<br><br clear="all">
<meta name="qrichtext" content="1"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><style type="text/css">
p, li { white-space: pre-wrap; }
</style>
<p style="margin: 0px; text-indent: 0px;">\makeatletter</p>
<p style="margin: 0px; text-indent: 0px;">\renewcommand{\poemtitlefont}{\normalfont\large\bfseries\if@RTL\hebrewfont\fi\centering}</p>
<p style="margin: 0px; text-indent: 0px;">\makeatother</p><br>-- <br>Best wishes,<br>Vafa Khalighi<br>
</div>