Playing with all my new toys since Astricon - User Manager on 12 (12.0.11) re-writes the password every time I submit a user even if I don’t change the password - I found this because I have been playing extensively with UCP, and buying commercial modules and then checking to see how they look in UCP. As I add new modules, I have to go into User Management and enable that feature on my user I am testing with and each time I submit without putting my user password back in the blank, I am logged out of UCP and can’t log back in until I reset the password and submit.
Actually it doesn’t reset the password it clears the active sessions. This is because if you add or remove something in ucp through user manager it has to be reflected in the interface. The only way to do that is log you out so that the assets refresh. Normally when you are logged in the assets do not refresh to save on bandwidth