Outburst evolution as monitored by NICER. Top panel: NICER 0.5–10 keV light curve using 10-s bins. The blue-shaded region represents the epoch of SiFAP2 observation, while the red-shaded region represents NuSTAR observation. Bottom-left panel: Type I X-ray burst in the 0.5–10 keV light curve of ObsID 6560010101 binned at 0.1 seconds. Bottom middle panel: Zoom-in of the light curve of ObsID 6560010104 binned at 0.5 seconds showing the increase of the X-ray flux just after the end of NuSTAR observation. Bottom-right panel: Tail of type-I X-ray burst in the 0.5–10 keV light curve of ObsID 6560010108 binned at 1 second.