Sorry to hijack your thread Titus (hi!)
Does the mark-to-ligature (gpos type 6) lookup also generate in scripts other than Arabic and Hebrew? I need this for the Nukta in Gujarati conjuncts where it can be applied to both–1st and 2nd consonant in the conjunct. The following image illustrates
bottomleft_2 under their respective consonant.
The result is a mark-to-base lookup with only the first anchor being registered. Is there anything else I need to do to activate the generation of the mark-to-ligature feature?