Some visible and some invisible processing methods of WeChat personalized signature;

Change it in the settings first. If it is not successful, enter the application management, click on WeChat, and then select Clear Cache. In addition, the new personality signature contains characters that are not allowed to be entered by the system and will be blocked, so you cannot update your personality signature and always display the old one.

Put you on the blacklist of friends, so that he (she) can't see my circle of friends and his (her) signature can't be seen.