Duty cycle for PWM / its visualization in scope not working in 0.5.15-RC2/RC3?

I just tried to use PWM via WaveGen with  "Wave Type" Square and "Freq" 1000 and visualize the output with a scope.
When changing the duty cycle, the scope shows somehow always a duty cycle of 50, but changes the shown frequency.

In 0.5.15-RC1 it was working. It might be a problem of the scope.

Yes, there is an error in WaveGen for square wave.
It was introduced in RC2 when converting to new simulation core.
It's already solved in development version.