The "close e" is not a meaning of the glyph. It is "closed shape e". See: Rudimentas' "Our Fater prayer"

In Old Hungarian, the "points" of letters always point in the reading direction. This font doesn't do that when the forced-LTR mark is used, it instead gives glyphs laid out LTR, but pointing RTL.

Old Hungarian employed a number of ligatures, but only small of them included in Unicode. As my propersal, you can adding rules to make letters produce ligature by inserting ZWJ between them, e.g. 𐲀[ZWJ]𐲂, and making them available via ccmp feature.

The q, w, y, x, dz and dzs ligatures smaller than the other letters. It's given capital and small ligatures, too.

@sztupy
The standard form of Unicode Old Hungarian symbols downloadable from:
https://unicode.org/charts/PDF/U10C80.pdf#page=2
The Unicode submission by Dr. Gábor Hosszú, downloadable from :
https://www.unicode.org/L2/L2012/12014-n4183-hungarian.pdf#page=28
Submission of Dr. Gábor Hosszú was preferred by members of Rovas Foundation.
As you can see, the "close e" and "h" letters form was the same as in final standard.
The form of "rudimenta oe" must to have same form as in standard, because this form is come from the one of the main finds, named "rudimenta".
Rovas Foundation try to mislead everybody, and blocks the standard.
Last action of Tamás Rumi was blocking the development of Noto-fonts project's Old Hungarian font, on that way, that demanded assign to concrete code points for "letters" "q", "w", "x","y","dz" and "dzs", and demanded replace the standard form of letter "rudimenta oe", "close e" and "h". The standard form of letters had been developed before.
The Noto-fonts required for Google for Android devices and Google Chrome OS.

rovas.txt

The attached screenshot is created using “pango-view ~/rovas.txt”

rovas.txt is also attached. It contains:

𐳀 𐳂
ع ى
א ב
a b

I.e. 4 lines with two characters and a space in between in each line.

The first line is Old Hungarian, the second line Arabic, the third line Hebrew and the fourth line
Latin.

In the screenshot one can see that pango renders the space between the two Old Hungarian
characters in the first line as a replacement character (A Box with the code point 0020 written
into the box). The reason for this is that the Old Hungarian font (which I downloaded from this git
repository here) does not contain a space. I am not sure whether that should be considered
a bug in pango or not (Should pango fall back to some other font to get a space??).

But the easiest fix is probably to add a space glyph to the font.

Having a space glyph is probably a good idea and might avoid more such rendering problems.