[O] missing fancy character when using org-bullets

[Giacomo M]

Dear all,
at work I have Windows 7, at home Windows 10. I use the same emacs 
configuration, and Consolas as the default font face.
I indulge myself using org-bullets. At work it works. At home the pretty 
symbol for 3-rd level outlines is missing. An empty rectangle is showing 
instead. Other symbols, like those for the first two levels headlines or 
things like \lambda, work.

Did anybody experience anything similar?

Thanks,

Giacomo