Brains get shit done, son
One thing I'm totally noticing with learning a language is that if I take a break for a few days, there are certain things that I remember or understand better when I come back to it. I noticed this with music too - practicing hard and then taking a few days off would always leave me playing better in the end.
I think it's partly because by taking a break, you stop practicing/reinforcing misconceptions or mistakes. If you have a certain idea in your head, either about how a certain passage is played, or your associations with a certain word, that are causing you to consistently fuck it up, taking a break gets you out of practice for that stuff as well. Coming back to it means those mistakes are less reinforced and it makes it easier to learn the right material the second time.
I think it's partly because by taking a break, you stop practicing/reinforcing misconceptions or mistakes. If you have a certain idea in your head, either about how a certain passage is played, or your associations with a certain word, that are causing you to consistently fuck it up, taking a break gets you out of practice for that stuff as well. Coming back to it means those mistakes are less reinforced and it makes it easier to learn the right material the second time.