Wrong "kashida" place in Arabic scripts


I am using some Arabic fonts in Office word. when I Justify low the paragraph, there are wrong kashida in some cases.

here is an example:


is that issue because the font itself or because issue with office Word application?
and how can I fix it?

Can you test it in a web browser?

its work fine in web and mac OS
the issue happend with Office Windows OS (Justify low)

I have not much experience with the kashida justification. You might get better feedback when you ask on typedrawers.com