Bogged down in the middle of LR

Here's the situation: during many of my times practice tests I find that I get bogged down in the middle of the section. I can make it through the first 10 questions with little issue and recover by the end but I find large chunks of wrong answers in the middle. Of course, there are questions I still struggle with and I understand that I can approach individual question types but does anyone have experience with this? Is it also true that the middle of the section is where the hardest questions are?