Results of the statistical analysis of the X-ray mode switching timescales. Left: Duration of the low-to-high mode switch (egress) as a function of the duration of the high-to-low mode switch (ingress) computed using data from XMM-Newton/EPIC (in red) and NICER (green). The circled green points represent the values for the ingress associated with the two millimetre flares detected with ALMA and the subsequent egress. The solid black line indicates where the two quantities are equal. Right: Distribution of the low-mode ingress (in green) and egress (in red) times in logarithmic scale from XMM-Newton and NICER data.