Does the Windows system patch automatically revert after uninstallation?

No, there's no problem with this behavior. Windows updates may be replaced by newer versions or patches to maintain system security and stability. After uninstalling a specific update (like KB5063878), Windows might automatically install the next available update (like KB5062533) to ensure the system is up to date. This is common and part of Windows' update management process. If you want to prevent automatic updates, you can pause them temporarily in Settings > Windows Update.