After update I have lost root privilege with my password. Both sudo and su did not worked.
I used solution to remove all keyboard layouts from settings, from some reason Manjaro considered Password* not equal to Password* if any layout has been present.
After removing all layouts, log in to your sudo in terminal and change password for root and user but do not use any special characters, make new password only from letters of english alphabet.
Then add your US or other keyboard layout and return to terminal, your new clean alfanumeric password should still work and now you should be able to set working password with special characters for root and user.
For people new to linux:
sudo passwd root
sudo passwd “your name”
Layouts are in system settings, under Hardware/input devices.