If the two front seats are mildly wet, then the front air bags will turn off. this means that if you spilled a drink, have bladder problems, went swimming or snowboarding, or have wet vacuumed your seats then the airbags will turn off. they are off until the seat completely dries wether you are moving or not. it happens every time the seat gets wet.
The passenger seat sensor has been going off when nothing is in the seat. because the sensor thinks something is in the seat the airbag for the passenger side is turned on. after going to the dealership, quirk subaru, in bangor maine, they told me my cell phone was setting off the sensor. their resolution to this problem, "don't bring your cell phone into the car." the car can be moving or stationary and will randomly turn on. it's gotten worse over the last year happening about 4 times since august of 2018. i have contacted subaru of america and they told me to go to another dealership to handle the matter. it is my opinion that this poses a risk to occupants inside the vehicle which may led to an unwanted airbag deployment.