If the issue persists, please try the following troubleshooting tips:
• Go back to the list of chats and then reopen the chat you're having issues with.
• Restart your device.
• Update the LINE app to the latest version.
• Check or disable any web limiting or filtering services you may have in place.
Note: Consult your mobile service provider for more information about web limiting and filtering services.
Additionally, if you failed to transfer your LINE account or have created multiple LINE accounts, you may encounter situations where you receive a notification, but the corresponding message does not exist.
Situations that may occur:
• Your old LINE account appears in your friends' friend lists on LINE.
• A friend is sending messages to your old LINE account.
• Notifications for messages sent to your old LINE account are being received on the device you're currently using.
Note: There may be times when you don't receive notifications.
To resolve the issue:
Please ask your friends to block your old LINE account and add your current LINE account in these cases.