I got stuck an utterly embarrassing amount of hours on this the other day because I recently changed my password but managed to set it with a typo.

I know it is correct, I wrote it down in my password manager, what the heck is going on, have I bern hacked? Do I have extremely specific disk corruption?

At the end I was wondering if the password algorithm was hitting some dodgy hardware (ram, rdseed32…) and just sat numbly and entered the password over and over again to see if it behaved differently. …and on one of those attempts I managed to do the same typo and the mystery was solved.