"A remote control key or Key Tag left in the car will be deactivated when the car is locked and the alarm is armed using another valid key. The 'Deadlock' function is also deactivated. The deactivated key is reactivated when the car is unlocked."
https://www.volvocars.com/uk/support...426-2019-18w17
The key is deactivated- meaning it is no more recognized by the car- the idea behind it being exactly the case scenario if a car is broken into so the car cannot be started using the key left in the vehicle.
Not sure how it works with locking/unlocking via app..