I've had this happen periodically over the past 2 years, but recently it has happened more often.
I start the car, ready light, start driving, and about 10-20 seconds later the doors lock, and the red dot security light starts blinking on the bottom right of the main display where the speedometer area is. Then if I stop, turn the car off and open my door, the alarm goes off. I have to hit the unlock on the remote before leaving the car to avoid it.
Anyone seen this or have any ideas?