For several weeks now I have had this happen intermittently. When I remotely lock my car and there is no chirp, I will experience the windows down and the drivers seat position changed within an hour or two.
The first inkling that something was wrong was when I locked the car with the remote and there was no chirp. Never put these symptoms together to mean anything until I realized that after the no chirp lock the windows would go down and the seat would change. Thought someone was pranking me, but it happens in front of my house.
I've been getting in the car and rolling up the windows and adjusting the seat everytime this happens. After adjusting everything the chirp comes back when I lock up. It functions properly for a little while and then repeats.