Why can’t see the messages within 24 hours in the Xiaomi Cloud of the Xiaomi smartphone?

If the SIM card is replaced after the device is restored to factory reset, to ensure data security, notification messages and ordinary messages within 24 hours in the Xiaomi Cloud cannot be synchronized to the device. But messages from 24 hours ago can be synchronized.
After inserting the original SIM card, ordinary messages can be synchronized. But notification messages within 24 hours cannot be synchronized. And messages from 24 hours ago can be synchronized.