Yeah, that always bugged me! The zero-with-a-slash only seems to be used in that flight plan section of the screen; all of the other zeroes are without the slash. And the "5" and "4" next to the zero-with-a-slash in the waypoint 5240N is clearly the B612 glyphs. So it makes me think that in the Airbus software, in contexts where there might be ambiguity between 0 and O or where there are mixed letters and numbers, they use the zero-with-a-slash, but everywhere else (numeric-only readouts, etc.) they use the non-slash zero.

And I wonder if there's a 0-with-a-slash in the downloadable version of the font, enabled with an OpenType stylistic set number or feature or something, or if that zero-with-a-slash is just something custom the Airbus folks do internally.