Rear window opening by itself

Anybody had this problem? On my 5-door, I went to the car this morning to find the driver side rear window completely open. It had been well below freezing overnight too, perhaps dodgy electrics?
Just wondered if anyone could share some advice on why this happened!
Otherwise it might be a first trip to the dealers!

The first freelanders used to do this , the rear screens often wound themselves down. The first BMW minis also had an issue with this too.

The position of the driver switches is just out of position from my Audi and I often press the rear windows down instead of front but dont realise ive done it until i hear the wind noise coming from back. Particularly the driver side