Add Other Font width problem

Glyphs
1

I Am creating layered font and trying add master from one file to another with different width by using Font Info > Masters > [+] > Add Other Font. The problem is that master from one font adds without width parameter to another.

For example, let’s take A glyphs, in 1st master Bold A - Width 550, LSB 25, RSB 25, in 2nd master Black A - Width 600, LSB 25, RSB 25, But when I add 2nd master to file with 1st Black A became Width 550, LSB 25, RSB -25.

Is this some kind of bug or just I Am using wrong method for this? What should I do to copy master from one file to another with saving its width?

2

Which app version are you using?

3

Glyphs 2.6

macOS Mojave version 10.14.2

4

It might be that the master IDs of both fonts are conflicting.

What masters are in the original fonts?