GSUB and overflow (particular case)

Hallo everybody and congratulations for your website and forum.

I’m working on new font and I’ve the overflow problem. I’ve read your suggestions about “feature LIGA” where you suggested to use “lookup” feature but it’ doesn’t solve my problem.
Can I send you file/project/feature/screen/example to understand the case? In my opinion this is a particular case… I suppose ;-))


Can you send me the .glyphs file please to support (at) (this website without www). I will have a look.