I have a refreshed LR, and for the last few weeks the driver seat sensor fails to detect that I have gotten off the seat, and when I exit the car it doesn't turn off, even when I manually lock it. So I have to open the driver door and close it again to make the car turn off. I only started noticing the issue after the software update that started causing the buzzing noise. I'm not sure if its a software issue, or the seat sensor died. If you look at the screen behind the yoke when this is happening it shows someone in the drivers seat without a seatbelt on.