family name parameter disappears from Glyphs Project after saving, closing and reopening (all in Glyphs 3)
Yes, i can reproduce it. Thanks for reporting.
Also when I don’t save, and just export from the new glyphs project; name ID 1 is the name of the source file and not the custom family name
Update: even exporting within from source file, Name ID 1 doesn’t take the custom family name into consideration.
I still save in Glyphs2 format.
It only changes ID 16: