It seems the battery is heated past 10C now on model 3 while charging. It used to always only go to 10C and turn off battery heating and just warm while charging. I plugged in tonight at about 72% after 24 hours of cold soaking battery is now 12.5C and battery heater is running full blast targetting 25C.
Edit: stopped heating at about 14C.
Edit: stopped heating at about 14C.