Signal visualization question in simulink Phasor mode

I have a very elementary setup in the attached file where i'm trying to visualise the voltage output of a three phase source.

When I click the scope, I get two flat lines (one for the real component and one for the imaginary). I expected to see a time varying sinusoid.

However when I do the simulation in "Continuous" mode (by changing the parameter in the "powergui" block), the sinusoid appears perfectly in the scope.

Why doesn't it show properly in Phasor mode?

I'm not sure what i'm doing wrong