This isn't the first extremely serious and dumb High Sierra password bug this year [1] [2], and unless Apple is severely hurt by it, so they're forced to change, it won't be the last. High Sierra is full of bugs and seemingly not just annoying bugs, but also security bugs.
Let's hope Apple gets sued for the damage they'll cause by including this bug in High Sierra so they make sure that next release of macOS won't be another bug filled mess.
[1] https://arstechnica.com/information-technology/2017/09/passw...
[2] https://www.macrumors.com/2017/10/05/macos-high-sierra-disk-...