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2019.8.5 fixed it for the first couple days after install, but then it went back to being unresponsive again with either HPWC or supercharger handle. It seems to randomly work now, not working more than it does.
My Model S just got 2019.12 from 2019.8.5 over WiFi in WA, USA. Our Model 3 is still on 2019.8.5.
FYI
First attempt to initiate update in the car was unsuccessful because it was in Sentry Mode.
Found this message on the screen when I went back to the car to see why it wasn’t installing.