2018 BMW X5 electrical system problems

Two incidents accured with 24hrs. My wife called me informing that the 2018 x5 was smoking from the front and making a weird noise, she stopped the vehicle and the vehicle started again. When she got home, I checked the under the hood, but could not see anything. But, can smell like burned wiring, but not visible. I connected ev wire to the vehicle and next morning disconnected the cable and when I started the vehicle, I saw smoke coming out of the inside bottom of the rear where the batteries are located.

The car displayed drivetrain malfunction warning message multiple times after the car reached 10k miles. The drivetrain malfunction message was reported to the dealer multiple times and dealer failed to provide proper explanation as well as failed to permanently fix the problem. The car is hybrid and the issue happens randomly when driven at speed between 60MPH to 80 MPH.