I did a reproduction experiment.
As you can see in the attached data, Enter and Release seemed to be executed properly and the current was almost the same as your measurements. However, there was a big difference in the current value after the third read ID. Also, my external Flash has a capacitor mounted between VCC and GND, so there seems to be a difference in the current waveform.
XIAO_nRF52840_extFlash.zip (1017.1 KB)
