Observations from K2 and TESS sectors 2, 42, and 69. The data were plotted against the HD 213985 orbital ephemeris of Oomen et al. (2018), where phase zero corresponds to the periastron passage and the dotted lines mark the phase of inferior conjunction (post-AGB star is closest to the observer). The fluxes were normalized to the mean flux in each dataset. The decrease in brightness at the orbital phase of 0.49 and a larger scatter of data at the time of inferior conjunction in TESS sector 69 data are likely instrumental artefacts.