Cannot log in to user account when starting KDE if the password is longer than 10 characters

[VNGamerGit]

I tried to log into the user account I've created via the Users section after installing Arch, then I install KDE in the DE section, reboot, and got into the login screen (example:
I set a password that has 11 characters (both uppercase and lowercase), and typed that password into the password prompt, but I can only type 10 characters, so I cannot log in. Is there someone who have a solution, and if not, how do I replace this login screen for something else that works?

[MatMoul]

I hope that you have found a solution...
I close this old issue.