It would be interesting to see your power meter waveforms both at the daily resolution and for an hour or so when the waveforms are most active. The power meter waveform might also show whether you have a “noisy” device that is masking other detections.
ps: Your “Always On” is pretty large in relation to most people’s. That’s a place that you could optimize even without any detections.
pss: Probably worth checking in with support@sense.com on this topic as well.