Sorry to bug you guys again, another mystery popped up: kcommaaccent is behaving weirdly, although k and kcommaaccent share same metrics (kcommaaccent is entirely made of components). Please have a look at the space between the two letters (see pics). I have no idea why kcommaaccent shows less space on the right.
It seems to have problems picking the right bracket layer when aligning the spacing.
Ah OK, and what would be the solution?
Edit: since this happens with many other diacritic glyphs.
Could you send me a file that shows this behaviour?
Done! Danke.
I had a look at the file. There is a problem with the preview of nested components that have brace layers. Final fonts are not affected by this. I have a look.