"Add Other Font" problems with other alphabets and signs

Hello everyone.

A few months ago I started redesigning the new version of one of my old fonts, starting from the old file, but there’s many changes and I added also arab alphabet, so I think I will also change the name. I read that it is better to create a new file in which to import the masters of the old project, right?

I don’t know what I’m doing wrong, but it imports only the masters of the Latin alphabet.