Yes, the bogus "unplugged" status surprised me yesterday. My climate control timer is set for 5:30 and if the car is unplugged the heat doesn't run as long, so when I thought the car was unplugged I left sooner to not just waste the power, only to get out to the car and find it using charger power to preheat.
LEAF '13 SL+Prem (mfg 12/13, leased 4/14, bought 5/17, sold 11/18) 34K mi, AHr 58, SOH 87%
Tesla S 75D (3/17) 29K mi
Tesla X 100D (ordered, 12/18 delivery) (replaced 3 reservation)