After upgrade to Windows 10 22H2 update theLogin Screen appears twicewhile sign in to the computer.
And the issue occurred even when locking and unlocking the workstation.
After the first PIN entry, Im back at the lock/login screen.
Also, some posts at the Microsoft Answers forum are mention this behavior.
According tothis MS Answers forum thread, this is a known issued in Windows 10 May Update.
Again open user account dialogue box, this time again checkmark on Require a Login box.
Restart the PC and check your issue is solved.
Remove duplicate usernames
These are some most applicable solutions to fix FixLogin Screen appears twicein Windows 10.