DS4 delays registering input in controller setting

[twotonkatrucks]

Myself and another forum user, pleasejust, have noticed that when setting up the DS4 controller, the input doesn't get recognized for several seconds. You have to hold the button down for a while (maybe 5-10 seconds) for the Dolphin to register the input and set the button in the controller configuration window. Is this intended behavior? Do other controller exhibit the same behavior?