Light curves and hardness ratio of the NuSTAR and XMM-Newton observations of the late flip-flops. We used the same energy ranges and time bins as in Fig. 4. The Burst mode is not included here, as it was strongly affected by soft proton flares. Vertical lines are drawn every 2610 s, showcasing that the late flip-flops also feature a period underlying the times of transition between the two flip-flop states.