Mine does that, it's been doing it since the cold has started abd hasn't been 'normal' since November. It's being taken in to the dealers in the very near future but mine is still under warranty. A few have said they suffer from this issue
I think it's a fault with the motor, failing to know it's 'park' position.
Here Is a video of mine
https://youtu.be/L11_QkT6rKk
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