Na I observed transmission light curves calculated using the passbands of 0.40 Å (top panel) and 0.75 Å (bottom panel). In light grey we show the original data containing the combinedHARPS-N and CARMENES results. The black dots are the data binned by 0.002 in orbital phase. In purple we present the transmission light curve modelled considering the CLV and RM effects. In light blue we mark the region around zero orbital phase where the data present an unexpected behaviour.