Ever since I got the 8.1 update I have found that the screen is far less responsive to swiping gestures. In particular, if I try to swipe up from the lock screen, it can take two or three swipes to actually work. The same is true when I receive a phone call. I will sometimes have to swipe up as many as three times for it to recognize the gesture. Is anybody else having the same problem? If so, has anybody found a solution?