Cases where BMs disappear at the same time as all administrators are removed from the system are often related to the algorithm detecting signs of abnormality during operation or being checked for validity. When this happens, BMs can be temporarily locked, hidden from the management interface, or in more serious cases, completely disappear and cannot be restored. The cause is often related to low trust, unstable login behavior, or being linked to a flagged account, so the level of impact will vary: sometimes it just needs to wait for the system to review and reappear, but in other cases it is permanently lost if it is assessed as high risk.