This may give you (us) a little insight.
Here is Sense native detection (orange) overlaid with smartplug detection on the same AC unit at the same time (as close as I could get it at least, sorry about the blurry bits).
Here we see, in Sense’s interpolated signature for the AC, that there is ramping, at the end of which it makes an assumption about the average usage (hence the flattened plateau in the wave) until the “switch-off” signal is detected. You can clearly see the blower still operating in the smartplug (blue) waveform.
Sense is assigning (from overall usage) your AC’s signature through that initial ramping and then getting confused and assuming a “switch off” signal after a couple of minutes.
A guess: the ramping is a little longer that “expected”? The end of the capacitor charge cycle is throwing things? Sense (@RyanAtSense): does this potentially imply something about the state of the unit?
