When I had encountered this issue, it was because I had essentially experienced burnout. Its really easy to develop a sort of tunnel vision with the LSAT, you start to miss the forest for the trees, so to speak. Everything you learn begins to just swim around in your head. What worked for me was dialing back my practice, or even not practicing certain days. A fresh mind makes a huge difference.

I also agree with the other poster, progression isn't linear, and when you change your thinking, you're going to have a regression before progression. If you went from driving automatic to driving stickshift, you're going to get worse at driving before better!