It's because players have no patience when it comes to winning the ball back. There isn't a plan or a shape for us to revert to when we lose the ball.
We often get loaded through because certain players charge from their position and the opposition get in behind them. This leads to put backbone being got at, and it tends to either lead to a goal, a chance or a free kick, usually because a recovering midfielder has tried to tackle from the wrong side, or the defender has stepped out too aggressively and commuted the foul.
It really annoys me. The PSG game was a great example. We all know how good Ibra is from 20-30 yards out with his free kicks yet we still commited stupid fouls. Total lack of intelligence and concentration.