If you have changed certain BIOS settings, the boot process might be interrupted, and then restarted. This is necessary to synchronize the settings between various system components.
If UEFI Late Synchronization is enabled, this interruption happens after POST messages are finished.
If UEFI Late Synchronization is not enabled, this interruption happens before POST messages start.
Boot messages scroll across the console screen.
The BIOS Setup Utility main screen appears.
The default is Enabled.
For BIOS screen details, see your server service manual.