Chazy
Better to use 5.20 for the moment, 5.21 is always beta, so just for testing and not yet released, so also without maintenance.
With the password, as I dont use 5.21 for the moment, I cannot tell you. What is possible, that you put the password and didnt looked if some crazy letters stay on the left of the entry (from the encrypted password) So better to put the cursor at the end to the left to be sure that no garbage is in this corner together with your clean password.