VLBA observations at 43 GHz performed in April 2021 (upper panel), October 2021 (middle panel), and April 2022 (lower panel). The contours are set to (−0.2, 0.2, 0.4, 0.8, 1.6, 3.2, 6.4, 12.8, 25.6, 51.2)% of the respective brightness peaks in each map. The images were produced with natural weighting and no taper. In all the maps, a counter jet is detected, as expected from previous VLBI observations (Boccardi et al. 2021; Park et al. 2021a). The observations performed in October 2021 hint at the presence of limb brightening on ∼4 mas scales, as suggested by Park et al. (2021a) and confirmed by Park et al. (2024).