I was playing puzzles and got one puzzle that was (in my opinion) pretty easy. lichess.org/training/61589
Then I got to the very next puzzle. lichess.org/training/61590
It was literally 1 move ahead.
And guess what? exact same solution for both.
What I find especially funny is that the first one was rated at 1612 while the second was rated at 1456. Not entirely sure how that happened but I thought it was funny.