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.