Friend-related issues

• The names of friends/groups appear as "Empty chat," "No members," or "Unknown"
• Friend list display issues
• Someone I don't know appeared in my friend list/My name appeared in someone else's friend list
• People I don't know are showing up in my friend recommendations
• Why does a blocked or removed friend still appear in my game rankings?
• I verified a Japanese phone number and can't search for IDs/phone numbers because age verification is required
• I can't add friends