Simulation of the template-fitting tests for temperature-to-polarization leakage in the 100-GHz maps, with (blue) and without (red) ADC-non-linearity dipole distortion. The green curve shows the result of the leakage fit in the HFI pre-2016 data, which is comparable to the simulation with the ADC non-linearities. The red curve is lower by a factor of 5 or more, showing that dipole distortions due to ADC non-linearity are a significant contributor to the leakage. The black dashed line corresponds to the fiducial model F-EE with τ = 0.066.