On Windows 11, the lock screen disappears immediately upon startup (opens in new tab)

Previously, the lock screen wallpaper would appear first after booting up, and the PIN entry screen would only appear after clicking the mouse. However, starting yesterday, the system goes directly to the PIN entry screen after booting up, skipping the lock screen wallpaper. If I manually press Win + L to lock the screen after booting up, it works normally. How can I restore the lock screen wallpaper that appears at startup?