Ligature Anchor Problem

[afekhar]

Salam dear brother,

First I want to congratulate you on this wonderful job you've done. In my point of view you're a genius!

I had lately a problem with a font (UthmanicHafs1 Ver09). I'm sure that this font is well done and I verified personally all its tables (in particular the Lookup tables) but I still have the problem you can see on the screenshot in attachement. So I concluded that your program might have a little bug. Can you please see what is the matter.

Thanks in advance.

Yours,

Ahmed.