Top panel: time evolution of the normalized growth rate for the same modes as in Fig. 2. The growth rate stays considerably low up to a certain point, where it starts increasing to become more than ten times larger than the growth rate of the MRI (for the cases that reach saturation). Middle panel: evolution of the time derivative of γ_PI for the fastest mode. We draw vertical lines where the derivative takes positive values and at its last local maximum before saturation. Between these times, the parasitic mode grows the fastest. In the bottom panel, we show the evolution of the wavevector angle θ. We depict horizontal gray lines showing θ₁ and θ₂, i.e., the values of θ that indicate the fastest growth of the parasitic mode.