Zoom-in on the dimming period from Fig. 4 with the same spectral lines using the same labels and colours. Light grey shows the V -filter light curve for reference (y-axis on the right). All four Fe I lines achieve similar maximum radial velocities during the dimming minimum, but the post-dimming behaviour is different: some lines have returned to their normal levels (orange and green in the figure), while others (red) retain the high radial velocity for longer.