I am noticing a bug with the shortcut keys for on (o), and the ramps up (u) and down (d). If I use the ramp down (d) for example, I can no longer use the on or ramp up keys after that, as the intensity at start and ends stays at zero. A similar thing will happen with the ramp u if used first. It seems like the state of the previous effect is being maintained, rather than being overwritten by the shortcut.