Justify reledpar columns

Question

How do I make both columns justified using reledpar? It looks like my right column (which is RTL) is justified but my left column (LTR) is not. I'm not sure what's causing this.

Here's a MWE without trying any alignment commands. (When I tried this, the opposite happened--only the English side was justified, the Hebrew was flush right.)

\documentclass{article}
\usepackage{reledmac}
\usepackage{reledpar}
\usepackage{fontspec}
\newfontfamily\hebrewfont[Script=Hebrew]{Ezra SIL}
\usepackage{polyglossia}
\setmainlanguage{english}
\setotherlanguage{hebrew}
\usepackage{bidi}
\begin{document}
\begin{pairs}
\begin{Leftside}
    \beginnumbering
    \pstart
        Column 1. The text of this column carries over into a second line.
    \pend
    \endnumbering
\end{Leftside}
\selectlanguage{hebrew}
\begin{Rightside}
    \beginnumbering
    \pstart
        עמוד \edtext{ב׳.}{\Afootnote{Footnote.}} הטקסט של העמוד הזה נמשך לשורה שנייה.
    \pend
    \endnumbering
\end{Rightside}
\end{pairs}
\Columns
\end{document}