when use @ mention someone in confluence conment, the symbol become another symbol~,

[Anna Zhu]

hello guys, could u please help me? 

when I use @ mention someone in confluence conment, the symbol become another symbol~, and the mentioned user can't receive any notification,thanks

[Angélica Luz]

Hi Anna,

Welcome to Atlassian Community!
Thank you for the screenshot.
For a better understanding of the issue, I would like to know more details about your environment.

Is this issue happening when mentioning any user or specific ones?
What is the Confluence version you are using?
What is the database are you using?

Looking forward to your reply.

Regards,
Angélica