Comparison of sodium doublet with the RM-effect corrected as in Borsa et al. (2021), without corrections, and over-corrected by a factor of five. The line position of the sodium doublet is indicated as a blue dotted line. The corrected doublet is seen on top, the uncorrected doublet in the middle, and the over-correction at the bottom. The high-velocity absorption components cannot be explained by an incorrect RM-effect correction, but are of atmospheric origin as the feature is seen in the uncorrected, corrected, and (even smeared out) in the over-corrected spectra.