5 ਤਾਰਿਆਂ ਵਿੱਚ 5 ਮਿਲੇ

This addon is really useful 4 someone like me who doesn't have an arabic keyboard and who is not familiar with arabic keyboard layout.Anyway I found a small bug :
for some unkown reason the following arabic letters don't render properley .
ؤ : ءءو
ئ : ءءي
إ : ءءا while this works A : إ
so I tried those settings and now they work :
(W : ؤ )
(Y : ئ)
any ideas why the previous settings didn't work ?

ਇਹ ਸਮੀਖਿਆ ਐਡ-ਆਨ (1.6.3) ਦੇ ਪਿਛਲੇ ਵਰਜਨ ਲਈ ਹੈ।