Arabic Font Issue – Letters Not Connecting Properly in OTF Export

Glyphs
1

,

I am working on an Arabic font for my graduation project, and I have encountered a major issue. When I export the font aOTF (OpenType Font), the Arabic letters do not connect properly and appear as separate characters. However, when I export the font as TTF (TrueType Font), it works fine, and the letters connect correctly.

2

I had a look at your file and it seems to work fine. Please answer to my email.