Unlocking the desktop in Linux is weird sometimes, where one display might initialise before another, and you start typing in your password and finish typing it in another display. Well, lo and behold, those are two different login screens, so you just entered the last half of your password, while the first half is elsewhere, so of course now you gotta wait for it to timeout and then do it again. It's a minor annoyance, but still weird that this is a thing.