Couple things...
Be honest with yourself. Are you missing shots or are you getting (further and further) out of line and after 5-6 balls now you have a super tough shot. No disrespect intended, but lying to yourself will not do you any good.
Now, if that's not the case...
I, personally, try to make sure my PSR is rock solid. When this happens to me, it's usually because I'm nervous/unsure of shot/over-confident. Making sure I'm in good balance, aligned properly, staying down, and really focusing on the shot.
It's funny, cause you'll see lot of opinions and if you look at many of the questions asked, it's often the same problem... not focusing. Please don't ask how to focus more or better. I've got nothin there