It does. Did you turn on Use Metronome Click Pattern for grid line? Click Patterns
What were you expecting that’s not happening?
(edit: Whether one considers the 4th beat in 12/8 as the 9th 8th note, or 4th dotted 1/4 is a matter of perspective. And Cubase does still see it as beat 9. But that is what what it is, no?)