Custom fonts on Windows Phone not working

Hi,

I am trying to integrate custom fonts into my Forms App. I got iOS and Android to work, but it doesn't seem to work properly with windows phone. The custom font is not showing up.

Just for checking, I fired up the "Working with Fonts" sample, and the custom font (SF Hollywood Hills) is not displayed here as well.

Has anyone encountered the same problem, or is this a bug?

Thanks,
Wolfgang