Please refer to Post #13 and the link below.
First, in the case of LightSleep (E2?), a 1mA pulse current flows every 1.28mS, similar to your waveform, and the average sleep current is 60uA. Next, in the case of DeepSleep (E4?), a 1mA peak current flows every 112mS, and the average sleep current is 2uA.
In my opinion, the difference in sleep current is likely due to the varying frequency at which RealTimeOS operates during sleep mode.
‘Light / Deep Sleep Current Comparison of XIAO_MG24 and XIAO_nRF52840’