We upgraded a Mac mini running Mojave to Catalina and one issue we found is that Open Directory users are told "Your account is locked." when they try to login after the display has gone to sleep. A work-around is to press option-return and then unlock the screen by entering the user name and password.
Open Directory "Your account is locked."
I'm also seeing this with Active Directory users. Local users seem unaffected.
I'm also seeing this with Active Directory accounts