My AC cut out after sitting still 3 hours in 95F heat in the sun. I was using my car as an office at the time. Power draw was 3-4kW, then went to 0 suddenly. I drove the car for 1 mile at 35mph and it suddenly came back strong, only drawing 1-1.5kW.
I was told on the forums there was a firmware update for the AC that cut the cooling power for early 2011s under certain conditions. But it's only happened when stationary once so I've never done anything about it.
If you we're driving at all when this happened, I suspect something is wrong with the car. I would replace the cabin air filter, and if it continued, check freon levels and whether the outside coil is obstructed.
2011 Silver SV, purchased 2018, lives in Missouri (previously in CA)
LeafSpy Pro + BAFX Products OBDII dongle
Battery swap 2019/04/24 (87% SOH, 12 bar)