Installed fresh manjaro KDE yesterday. Only patch it asked me to do was to download new kernel (5.0.1-1-manjaro).
Locked laptop, closed lid (suspends system), came back today, opened screen, it asked for password, it did not work anymore after like 10 tries… even clicked the eye to see the password I typed in, was correct one. Did hard reboot and then the same password worked perfectly again.
Just locking and unlocking by entering password works correctly.