I have the same problem, which is why I love my hybrid. I'm too green of a golfer to really be giving advise, but I think I understand the problem. If the club is topping the ball, or not getting down low enough into the grass, the bottom of your swing may be before or after the ball. This problem would not be noticable off the tee because you have some clearance to work with. I'd watch where the grass is being hit with some practice swings to see if this is the case.
Take this with a grain of salt since I shoot over 100
