Magnification of the highest velocity channels for ¹³CO (top panels) and C¹⁸O (bottom panels), highlighting that the emission centroid does not move closer to the continuum peak position (marked with a cross) with increasing velocity offset. Only emission above the 3σ level is shown. The velocity relative to the systemic velocity of v_lsr = 5.9 km s⁻¹ is listed in the top right corner of each panel. For each velocity offset, both blue- (south of source position) and redshifted emission (north of source position) are shown in the same panel. The dotted contour marks the inner 10 au where the T13 model predicts the continuum to be optically thick. The black contour in the left panels shows the synthesized beam.