I get the feeling! The exact same thing happened to me. I just studied the concepts and question types for like 3 months and didn't PT at all. And then when I took a PT again it was like one point better. What helped was just doing more PT's and individual timed sections more often, and each time I got higher scores. Nothing special, but that's what helped me.

Also what helped with LG was drilling the medium difficult ones as fast as I could. So then when I do a PT I feel confident in getting those out of the way and having more time for difficult ones. Personally, LG just requires a lot of practice and you will improve! Hope that is a bit helpful.

Thank you!!!