Not all characters of embedded font displaying
I have embedded a font specifically to add some Wingding-like characters into my ebook. The font is a Unicode TTF developed by Google. When I type in the Unicode character codes into Sigil, most appear as expected. But when I open the ePub in ADE, only one of five are displaying; the rest are the typical empty boxes.
When I convert to Kindle, all appear.
However, I then tested some other characters but they are not displaying in Sigil, ADE, or Kindle.
I'm stumped. I thought the point of embedding fonts was to work around the character limitations of ebooks/ereaders. I also assumed -- clearly wrongly -- that if a character appears in the embedded font itself then the character will display in the ebook.
I have checked the ePub in IDPF's online ePub check to be sure I didn't mess up the code; all passes.
Are there limitations to embedded fonts that I am not aware of?
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