Description of problem:
If you enter a username and password into sddn Login screen, and the login fails, both the username and the password are left entered. While this makes sense for the username, it makes no sense for the password, since there is no way to fix the password except reentry. Ie, You have to backspace or delete every character in the hidden password to retry the password. This is new behaviour and likely unwanted by almost everyone.
Version-Release number of selected component (if applicable):
I can confirm and also the error message is hardly visible, so that can make users believe that their password was not taken into account.
I made a fresh install with sta2 and updated the system with cauldron. I can confirm this bug.
Uploaded sddm-0.17.0-3 for cauldron with the bundled theme modified to blank an incorrect password. Also bumped up the font size for the incorrect password message that is displayed. If neoclust approves, I will submit the same changes for mga6.