I have a font where /four.tf contains /four.lf as a component, and four.lf contains /four as a component. When I use the Rename Glyphs filter to make tabular figures default (four=four.tf
), Glyphs exports TTFs where /four appears empty because /four contains /four.lf as a component, but /four.lf is totally empty.
Add a decomposition PreFilter.