propulsion barrels lag

In Donkey Kong Country 1 the propulsion barrels had an immediate answer when you pushed the button to eject the kongs. But in DKC 2 and DKC 3 there is a very annoying "lag" between the moment when you push the button and the moment when the kongs are actually ejected. That was corrected in GBA versions (at least for DKC 3, didn't check for DKC 2). I think that it was a real regression if you compare to DKC 1. I have no idea about why DKC 2 and DKC 3 have this big drawback.