Why does the nail show that the punching information sent by the teacher is lost?

Nail shows that the punching information sent by the teacher is lost for the following reasons:

1. Network connection problem: If the device or network connection is unstable, information may be lost during transmission.

2. Operation error: There may be operation errors when processing card information, such as accidental deletion or marking as read.

3. Server problem: It may be that the nailing server has a fault or problem, which causes the card information not to be displayed normally. This situation is usually fixed in the nail background.

4. Software update: If the nail application or device operating system is updated, it may be incompatible with the previous version, resulting in the loss of card information.