That's strange. I have Windows Hello enabled on my work laptop, and if I log out it does not log me back in automatically even I'm still there looking at the camera. The camera will immediately ...

A recent Windows update has changed how Windows Hello face unlock works, now requiring a color camera in addition to IR sensors to authenticate you. That means it no longer works in the dark.

The newest revision of Windows Hello Face requires a color camera to authenticate logins in addition to the use of IR sensors, somewhat limiting the function's usability in low-light scenarios.

Microsoft’s Windows Hello face unlock feature no longer works in dark rooms, and it’s not a bug. Microsoft quietly made the change to Windows Hello in April, in order to fix a vulnerability ...

If you've set up Facial recognition on your Windows 11 PC using a compatible camera and want to turn off Face recognition, follow this guide.