Hi there - I’m a total newbie, working on a hand lettered font.
I had alternates and ligatures working in Glyphs App. I made a few changes (changed the style of my y and removed a previous y end form, which I also deleted from the features) and when I saved I couldn’t get even the unchanged ligatures and alternates working again.
Not a cache problem, I’ve been saving different names with each export. But anyways, I’m saying that the ligatures aren’t showing up even within Glyphs!
Don’t use space for context in OT features. Your font will behave differently in different environments. Rather, use an ignore statement. See the Positional Alternates tutorial for details.
What exactly are you typing with the features on? Lowercase f, followed by r?