10.14.1 update login password keyboard change
The latest MacOS Mojave update (10.14.1) causes keyboard setup change at login. After the update the keyboard at login will change from QWERTZ to QWERTY. This will disable users to login if they have "z" or "y" in their passwords. The solution is to exchange z to y or y to z at login. However this is applies when login after screen lock.
macOS Mojave (10.14.1)