It doesn't just happen with the diesel engine models.
I had my rear pads stick to the rotors. I washed the car and put in in the garage with the park brake on then went for planned surgery and didn't drive it for 4 weeks. It took a fair bit of effort (abuse) to get them to let go. When they did let go there was a residue on the rotors that caused a bad vibration every time the brakes were applied the first few times but it quickly wore off.
I wonder that the problem is related to the composition of the pads and the move away from materials like asbestos on the pads.
The brakes work really well but there is almost never any noticeable dust residue on the wheels when ever I wash the car unlike every other car I've owned.
There is probably no need to apply the park brake when parked in the garage, the floor is usually level and the gear selector is in park which in itself has a lock which stops the vehicle moving.