Perhaps you are seeing the puzzles as non-competitive and, therefore, handling them better. I would guess that the knowledge acquired from the puzzles is not impacting the rated games because something else is happening when you engage in a competitive game.
In the past year, my puzzle score has gone up about 400 points and I am over 2000.
But it hasn't meant a thing when it comes to playing chess. In fact, my rating says that I have gotten worse at chess in the last year. My rapid rating has dropped over 100 points and my daily rating is down quite a bit too. It's hit the point where I don't want to join team matches because I don't feel like handing the other team an automatic 2 points before the match even starts.
Of course, I know I am still a raw novice despite playing a lot for years. I've been told "do the lessons and the puzzles and you'll improve." Nope. It's not happening. I've managed to get a lot worse.