[raghiid]

I use calibre's search & replace feature to enable ligatures in the book (fi, fl) and they work great, but sometimes, within a book there are some fi's and fl's that are not replaced by their ligature glyph, as if calibre skipped over them. What's wrong here?

I'm using calibre 3.48 (last version supported by my mac) and convert to azw3 and I use the "hyphenate this" plugin.