I exported the same file from G2 and G3 but the one of G3 is not doing the substitutions.
Yes there is a bug. AFAIK it is fixed in the upcoming app version.
Was this issue resolved? I’m experiencing the same issues, but Glyphs is telling me I have the most up to date version. Currently running 3.0.1 (3039)
In Preferences > Updates, check the box for “Show cutting edge versions,” currently 3.0.2 . Then do a Check for Updates or just restart Glyphs.
Updated and still not working…
Can you send me your file?