Panel a : phase-folded light curve of TIC 312111544 as observed in Sectors 61, 72, and 88 showing one rotational period (P_rot = 14.7045 d). Phase zero corresponds to rotational light maximum at 59 971.5158 (BJD-2 400 000). Panels b and c: amplitude and phase variability of the pulsation mode ν found by breaking the Sector 61, 72, and 88 light curves into segments. The black solid line represents the theoretical amplitude and phase modulation for a pure dipole mode modelled according to Kurtz (1992) using data from Sector 61.