Possibly after going a goal up, just for 10 mins set your teams mentality to more defensive. And set closing down all over pitch with tight marking ticked. I do it in every game and ever seem to have that problem.
its down to the mental stats of your players, dont underestimate the determination stat, it stops your players getting complacent after scoring and late into the game while leading, also it stops your team falling apart when you go a goal down, it makes the difference between a team that loves to win and a team that hates to loose.