For Example, I use a software application almost everyday for my job. It requires me to type in the password, its a very easy password to remember. I will randomly have a moment every once in a while where I completely forget the password and have to look it up. Or sometimes just try to shut my mind off and hope muscle memory figures it out.
Why is that? What is happening?
I would assume its a similar effect to when you look at a word you write very frequently and one day it suddenly looks like its misspelled even though its not.