[XeTeX] Strange issue with tanwin, arabxetex

[Akira Kakuto]

Hi,

> The previous set up of arabxetex compiled with TeXlive 2014 handled this 
> situation fine, but for some reason it is not working with TeXLive 2015.

The arabxetex is not changed. Also I think that TECkit is not changed.
I don't understand anything about the problem, but
note that the xelatex kernel is different compared with that in TL 2014.

-- 
Best,
Akira