\addfontfeature resets \prehyphenchar and \posthyphenchar

Question

This question is similar, but applies only to X_ET_EX.

In LuaT_EX, \prehyphenchar and \posthyphenchar supposedly affect the current language:

All languages start out with \prehyphenchar=`\-, \posthyphenchar=0, \preexhyphenchar=0 and \postexhyphenchar=0. When you assign the values of one of these four parameters, you are actually changing the settings for the current \language, this behaviour is compatible with \patterns and \hyphenation.
(LuaT_EX Reference v1.0.7, section 4.4)

However, after changing \addfontfeature, both of those reset to the defaults. Can the hyphenation characters be made permanent? How?

\documentclass[a4paper]{article}
\pagestyle{empty}
\setlength{\textwidth}{17em}

\RequirePackage{lipsum}

\RequirePackage{fontspec}
\setmainfont{cmunrm.otf}

\RequirePackage{polyglossia}
\setmainlanguage{english}
\addto\captionsenglish{\prehyphenchar=`¶ \posthyphenchar=`¶}
\prehyphenchar=`¶ \posthyphenchar=`¶

\begin{document}

\begin{english}
\lipsum*[1]\par
{\addfontfeature{Path}---any feature: hyphen reset---}\par
\lipsum*[1]\par
\end{english}

\end{document}