FWIW 2015 S70D just did the 2020.36.3.1. Parked the car today and about 10 minutes later got the 'some or all windows down' push notification, even though all are closed. I also presumed that a window calibration was needed, so I did the calibration on all 4 windows. Has not recurred yet.
One other thought--as I recall the windows are on the same 'circuit' as the door puddle lamps and red door safety lamps. I had upgraded the puddle lamps with AO ones (brighter), and recall that one time in the past I had the car in for service, and they did run some diagnostics and claimed that the lamps were messing up stuff on the CANBUS. So is it possible that there could be some interference on the CANBUS that sends out a false 'window down' message??