I am starting to see that if the user chooses to drop power and then startup the power again the camera seem to default to on even if the last setting was off. At least this has occurred with my newer production run cameras. I have posted that the setting for camera on/off seem to toggle to power on when there i power bumps.
Can you verify this is the case?
Some folks have suggest an uninterruptible power supply is necessary to get around this condition.