While testing font export, I found that unicode mapping was wrong when I set the Korean font to ROS Adobe-KR-9 on Glyphs3 and exported it. I remember that I didn’t have this problem in the early days of Glyphs3.
Glyphs2 does not detect the problem.
Should the Character Collection be exactly the same as Adobe-KR-9?
Export to Glyphs2
Export to Glyphs3