This is very interesting. I just dropped off my 2021 GMC Yukon AT4 at the dealership for the 3rd time in the 4 months I've owned it. Without going into long and boring details, none of the engineers at the 3 different dealerships I've gone to can figure out why it's happening. Today (when it happened again) I had an epiphany that it might be connected to when I remote start from the app. Shared this with the dealership so hopefully it will help fix the problem.This is documented in the ‘software calibration’ recall.
Do not use remote start, and do not use scheduled departure for now. That is, until you get your software updated. Apparently, those features could set this off.
I hope this ‘software calibration’ fixes your issue, and its not something new.
This is from my experience: if you have Android Auto (or Carplay) active, you have to use that software to control the phone. You cannot have the car Bluetooth phone link and AA(CP) controlling the phone features at the same time. If you activate Bluetooth, it will disconnect AA(CP). And vice-versa.
When using AA(CP), press and hold the face button on the right side till you hear the Alexa (or Siri) chime. Then just use voice commands.
From what I have seen, the Built-in navigation only shows chargers when you enter a route. Or, if the car range falls below the SoC you set in the big screen. It is otherwise littered with Points-of-interest. I haven’t had the time to play with the navigation too much.