Hello Everyone,
I am testing the below fixlet for In-place OS upgrade from Windows 10 to 11. On some machines it was good but on few machines post completion of action and reboot it is coming back with Bitlocker screen where it is asking for recovery key and after entering the key I am able to login but its on same OS.
1111923 Windows 11 Business Editions Version 24H2 Available - Windows 11 (x64) (English (United States))
Please reply if someone has got the similar issue and got any fix 
official documentation of Microsoft setup - Windows Setup Command-Line Options | Microsoft Learn
By default, the Setup Attempts an upgrade without suspending BitLocker. If the upgrade fails, Windows Setup will suspend BitLocker and complete the upgrade. This is the default behavior if the /BitLocker option is not specified.
Just to make sure on those machines you encountered the issue - Do you have the Latest UEFI Firmware of that model installed? I had before weird issues which resolved after firmware update