1. First thing I did was to check all the settings. Parking mode timer off. Enter-parking mode timer off too, for what it's worth. (I have tried turning those both ON, too. 48 Hrs for the parking mode timer. No change.) I have tried different parking modes including time-lapse, low bit rate, impact. It shuts off dependably in every mode.
2. I am using the HK4 hardwire kit. Installed it for my A229 Pro. The 229 works perfectly. Will record all night in any mode. No issues. I am not re-using the old GPS mount because I wanted to change the camera position and just kept the old mount with the old camera.
3. Good question, hadn't considered this because the car and battery are just six months old ('24 Genesis G70), and because of another thing... sometimes the camera will power off about 90 seconds after the camera powers down. I checked this time interval five times in a row, and I don't think the battery would happen to drop below the cutoff every time in 90 seconds, but I will check this.
I'll also try resetting and checking its idea of power-down voltage.
I think I've covered the basics, but this is great feedback, thank you!