Hyphenation character makes Hebrew words disappear in HarfTeX

Hebrew uses maqaf as a hyphenation character, and I have to declare it if I want to use it instead of the usual hyphen. However, this declaration somehow makes certain words disappear in Hebrew when I use HarfTeX with LuaLaTeX. Please see my example below:

documentclass{minimal}
usepackage[nil,bidi=basic]{babel} 
babelprovide[import]{hebrew}
babelfont[hebrew]{rm}[RawFeature={mode=harf},Script=Hebrew,Language=Default]{SBL Hebrew}
exhyphenchar=`־ % If I comments this out, the words are displayed correctly.

begin{document}
selectlanguage{hebrew}

כׇּל־הַשֹּׁמֵ֖עַ

כִּֽי־שָׁמַ֧ע

כִּֽי־בָרֵ֣ךְ

end{document}

KLUDGE: If I put the maqaf in slanted (doesn’t have visible effect), it seems to circumvent the problem, but I assume there is a bug somewhere.