Playfair Display not working across macOS/Windows

A user wrote,

> In our company we are using the „Playfair Display“ font. One of our colleagues is using a Windows device while all the others are using Apple devices.
>
> When my colleague with his Windows device opens a Powerpoint file, which I sent with my Macbook, instead of the Playfair Display font a fallback font is displayed.
>
> We already deleted and installed the font, but the problem is still there. Between Macbooks there is no such issue and I already tried to send the file zipped, to see if this is related to the mail program, which is not the case.

I guess this may be because the name table of the currently shipping fonts is not set up correctly.