Plateau at about 150 LeetCode problems. Mediums that felt doable last month now feel like walls

What moved me was switching from solving to re-solving. I pick twenty problems I already got accepted, close the tab, and write them again from the prompt in a plain text file with no autocomplete. It's slower. The bugs I used to make on the second pass stopped showing up, which I think is the real signal. Not saying it's the answer for everyone, just what changed my numbers.