I’ve seen the lights flashing when washing the car but the mirrors don’t fold in as they do when I touch the pad to lock the doors. Those sensors are easily confused.
As an additional caution for those with the foot action liftgate feature, the manual warns not to have the fob in your pocket when washing the car as splashing water under the bumper may open the liftgate if the fob is near the rear.
The keyless entry has saved my bacon a couple of times. It’s easy to lock my keys inside the travel trailer in the middle of nowhere. I keep a spare trailer key in the Expy.