It may not be the same thing but I think there are a lot of similarities..
During the major match season, if I am practicing heavily throughout the week, chances are I will not do too well at the match. I have talked about this with Max and come up with that once we get to a certain level in ability, too much practice will make you over confident.
If I don't even LOOK at the gun the week before the match, I will usually burn it down. My guess is because you haven't practiced (but you ability level is still there of course) your sub-conscious goes into the mode of "uh oh, I didn't practice....I better REALLY pay attention to the shooting."
Might be something similar in there to what your talkin about.