This is close enough to the "can't log in to computer when standing up" bug... someone had swapped the keycaps for D/F (for example) so when 5-star general tried to log in when standing up he was typing "doobar" instead of "foobar" into the password field.
With the lady, if she'd dialed it back a bit on her pace of work "because people are watching", that could have been a crazy one to debug... "only happens when no one is watching (and I'm not beastly-WPM closing cases)"