The wandering wasla

[MAZ06]

Font

NotoNaskhArabic[wght].ttf

Where the font came from, and when

https://github.com/notofonts/arabic/releases

Font Version

Noto Naskh Arabic 2.021

OS name and version

Windows 11

Application name and version

Everything

Issue

The wasla on U+0671 likes to wander over to the end of the word in Naskh. Found this in the phrase إِنْ شَاءَ ٱللّٰهُ.

Character data

ٱللّٰهُ

Screenshot

[MAZ06]

It seems that ligation is happening for ٱللّٰهُ in Naskh, but not in Sans or Kufi (unless discretionary ligatures are on). Which is the correct intended behavior?

Whatever the case, when discretionary ligatures are turned on in Kufi, both lams get smaller. Is that intended? The damma on the heh also moves slightly for some reason.

[MAZ06]

In Sans (with discretionary ligatures on) in the heavier weights, the heh becomes a little squished and the word gets misaligned starting at the second lam.

In the lighter weights, the lam is still misaligned and the heh is actually taller.

Similar issues with Kufi:

In Naskh (with discretionary ligatures on), everything is messed up.
Aligned to the alef:

Aligned to the first lam: