請問: 485 online status 不見了??

大家好! 今天查485 發現以下信息.

The status for this Receipt Number cannot be found at this time in this automated system. Please check your case receipt number to see if it is correct. If you have questions or concerns about your case status, please contact the National Customer Service Center.

我們非常確定Receipt Number 沒有錯. 請問您們有類似經曆嗎? 您是怎樣處理的? 謝謝!