Logic Pro X '0' not working as keyboard shortcut for "Stop"

Of all the useful keyboard shortcuts... "stop" (inc going back to the beginning of the song) would be the most useful - particularly when I'm in the Score Editor. However, it's not working for me; when I press '0' the screen just flashes, but nothing else happens.

I'm on a MacBook Pro - perhaps only the '0' from the keyboard number pad works? Anyone else have the same problem (and/or a workaround)?