Hieroglyphs: invisible characters are not invisible

[Bernd]

Expect the unexpected :)

(Sorry for prescribing the font.)

Example: Two separate eyebrows vs vertically joined eyebrows.

Kind regards,

Bernd


%% LyX 2.3.4.3 created this file. For more info, see http://www.lyx.org/.

%% Do not edit unless you really know what you are doing.

\documentclass[english]{article}

\usepackage{fontspec}

\usepackage{polyglossia}

\setdefaultlanguage[variant=american]{english}

\begin{document}

{\fontspec{Aegyptus}𓂃 𓂃 / 𓐰𓂃𓂃}


~


{\fontspec{Aegyptus}This sign (U+13430 EGYPTIAN HIEROGLYPH VERTICAL

JOINER) should be invisible: 𓐰}

\end{document}


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%% LyX 2.3.4.3 created this file.  For more info, see http://www.lyx.org/.
%% Do not edit unless you really know what you are doing.
\documentclass[english]{article}
\usepackage{fontspec}
\usepackage{polyglossia}
\setdefaultlanguage[variant=american]{english}
\begin{document}
{\fontspec{Aegyptus}𓂃 𓂃 / 𓐰𓂃𓂃} 

~

{\fontspec{Aegyptus}This sign (U+13430 EGYPTIAN HIEROGLYPH VERTICAL
JOINER) should be invisible: 𓐰} 
\end{document}