Formation in the Arabic language

Hello , All gays 

i have a problem with Arabic in Articulate story line , when i write words with its formation like as رَبِّ   or  ٱلرَّحۡمَٰنِ  , the formation of letters changed in preview and also when purplish  the project 
this problem face many users and developers who use Arabic language with all fonts 
i uploaded two image which show the exact Problem 

Please , if anyone can help us in that , i will be happy