Spurious unsupported script warning with XeTeX possibly opentype specific or related to variant scripts

Description

fontspec warns that David CLM does not support the Script Hebrew, even though it does. The warning is produced only for XeTeX - luaTeX doesn't complain - and does not seem to affect the output.

Possibly this is because the font is opentype, but I'm not certain. I could not reproduce the warning with the truetype font I tried.

Or perhaps it is because David CLM supports two sub-types of the Hebrew script, though fontspec's Script key doesn't support these.

Check/indicate

[ x] Relevant for XeTeX
[ ] Relevant for LuaTeX
[ x] Issue tracker has been searched for similar issues?
[ x] Links to discussion if appropriate

Minimal example demonstrating the issue

\documentclass[12pt]{article}

\usepackage{polyglossia}
\usepackage{amsfonts}

\setmainlanguage{hebrew}
\setotherlanguage{english}

\newfontfamily{\hebrewfont}[Script=Hebrew]{David CLM}
% \newfontfamily{\hebrewfont}[Script=Hebrew]{DejaVu Sans}
\newfontfamily{\englishfont}{Latin Modern Roman}

\begin{document}

\title{שם ומספר הקורס}
\author{השם שלי}
\maketitle

\end{document}

Produces

Package fontspec Warning: Font "David CLM" does not contain requested Script
(fontspec)                "Hebrew".

Further details

https://tex.stackexchange.com/q/717421/ [but not really about this issue]

otfinfo -s fonts/opentype/public/culmus/DavidCLM-Medium.otf
hebr            Hebrew
hebr.JII        Hebrew/Yiddish
hebr.JUD        Hebrew/Ladino

For comparison with the truetype font I tried:

otfinfo -s fonts/truetype/public/dejavu/DejaVuSans.ttf
DFLT            Default
arab            Arabic
arab.KUR        Arabic/Kurdish
arab.SND        Arabic/Sindhi
arab.URD        Arabic/Urdu
armn            Armenian
brai            Braille
cans            Canadian Syllabics
cher            Cherokee
cyrl            Cyrillic
cyrl.MKD        Cyrillic/Macedonian
cyrl.SRB        Cyrillic/Serbian
geor            Georgian
grek            Greek
hani            CJK Ideographic
hebr            Hebrew
kana            Hiragana/Katakana
lao             Lao
latn            Latin
latn.ISM        Latin/Inari Sami
latn.KSM        Latin/Kildin Sami
latn.LSM        Latin/Lule Sami
latn.MOL        Latin/Moldavian
latn.NSM        Latin/Northern Sami
latn.ROM        Latin/Romanian
latn.SKS        Latin/Skolt Sami
latn.SSM        Latin/Southern Sami
math            Mathematical Alphanumeric Symbols
nko             N'Ko
ogam            Ogham
runr            Runic
tfng            Tifinagh
thai            Thai

latex3 / fontspec