Arabic lam alef and tatweel issues

You did a great work creating this fantastic app,
Since I am beginner I need some help to solve the issue with lam alef init and final, I drew it properly in the glyph but when I test it it combine the two lam and alef wrongly ex: (لـا ) and not like the correct one (لا) I tried updating glyph info but the problem still exists, same case for tatweel I added entry and exit anchors and updated glyph info but it does not connect with the precedent and the next letter ex:( ع ـ ربية).
Waiting for your support
Many thanks.

Where do you test this. You should try it in Indesign. If you are inside Glyphs, you need to activate the ligature features (in the lower left corner of the window).