> It seems that with the versions of Pango/Fontconfig in this Docker > image, the backslash character, which doesn't exist in Emmentaler, > causes a fallback text font to be used, which obviously defeats the > Emmentaler OTF feature that causes "9" and "\" to be combined > specially.
Hmm. Just to be sure it makes probably sense to also check whether the Emmentaler OTFs are identical in the binary and documentation builds... Werner