Variability observed for TIC 381942100. Top panel: Raw (SAP) flux from QLP light curves from TESS Sectors 64 and 65 (200-s cadence), showing the difference in variability between the highly variable light curve of Sector 65 compared to the nearly flat light curve of Sector 64. Middle panel: Processed (PDC SAP) flux from SPOC 120s cadence light curves from Sectors 37 and 38. Bottom panel: Discrete Fourier transform (DFT) of the QLP Sector 65 data, where several peaks are visible above the noise level. The dashed red line marks the adopted significance threshold.