Done it several times , the problem arises when the vehicle is locked with the remote or key less method this sets the alarm but when un locked with the emergency key method the alarm goes off and the only way to re set is by turning the ignition on , you may get a detection by putting the remote close to the button but pressing the start button with the remote will put the ignition on and the vehicle will actively looking for the transponder in the key
it’s not just VWG group vehicles that use this method , Toyota , Hyundai, Honda
Some BMW vehicles