Change the font to

Hamza+vowel. Test passes if the vowel sign is outside the hamza in each case.
سُٔس سِٕس
Vowel+hamza. Test passes if the vowel sign is outside the hamza in each case.
سُٔس سِٕس
CGJ is inserted between hamza and vowel. Test passes if the hamza is outside the vowel in each case.
سُ͏ٔس سِ͏ٕس