Bottom regions of piano keys play after a short delay when pressed
After I updated to iOS 7, when I play the piano, the lower most region of the piano keys don't play immediately. There is a short delay before the note is played. Moreover, the 'key press' animation is not visible although the note plays after some delay. This is a little annoying because while playing, the fingers can be at any region and the bottom part of the keys do not play properly. Also, GarageBand has become a little unresponsive, especially the pianos. This did not happen before the iOS update.
iPad (3rd gen) Wi-Fi + Cellular, iOS 7.0.2