- out of curiosity, do you know what version of software your car is running? If your engine cooling fan "runs for a while" after you shut off the car, it kind of sounds like my Karma used to behave in Phoenix after driving in hot weather on an older version of code. That older version of code was 5.10.
There have been 3 releases of code since 5.10, and you may want to consider getting the car updated to 5.35 (the 3 releases since baseline 5.10 are 5.20, 5.30 and 5.35). 5.20 changed the behavior of the car to shut off the fan immediately upon shutting down.
Sorry if you've already done these upgrades, just wanted to throw that out there.
P.S. I'm not suggesting this will fix the problem(s) you encountered the other day, but the 3 code updates fix lots of other issues with the car (some seen, many unseen). Good luck!