Definitely happens to me. I can't think about typing or I lose speed and accuracy. The one it backfires for me on is when I have to change password. I always do fine the same day but then I have the same cycle after:I would attribute that to plain old muscle memory.
If someone has typed the word "important" three thousand times, it's as though they've rehearsed that word like a pianist rehearses a passage – the pianist's goal is to train their mind to execute the sequence of movements with a minimum of conscious thought. (Then, when it comes time for them to type the rarer "imported," they might have to blink and think more deliberately.)
It would strike me as odd if this didn't happen to typists in various and individualized ways.
Put in wrong one and not catch it.
Put in wrong one but catch myself before hitting enter.
Then I finally get the new one right away
The nice thing about muscle memory is for PINS, I don't pick numbers that mean anything. I pick numbers that are easy to type. So it's quick for muscle memory to master, but no one can use things familar to me to hack it.