I see the latest versions of glyphs has removed the unicodes for f_f, f_l, f_f_l etc.
Could we have these back?
At GF, we use pyftsubset with settings that strips out the liga feature. This means these glyphs are not accessible for us any more.
You can add them yourself with a custom GlyphData.xml file that only contains a lines for each of the glyphs.