Password not recognized

Hello again. I have upgraded today (KDE). Things felt good but now, in a terminal if I type sudo, my password is not recognized! Twice before, before upgrading, I had trouble logging in for the same reason. I have used the same password since the beginning. What is happening?
I have rebooted but it didn’t change anything. Recognized when logging in but not later.

Do you have multiple keyboard layouts and the system switches to another one, hence the password is actually not correct or you imply there is another issue ?
Something similar