Mail alias seems not work

I have set my email alias to the Google mail service,

but I have not received any mail from some days ago
which mails’ recipient is mail alias.
what is something wrong in the alias server?

I do not know how this situation to be handled.

Logs show you are receiving emails correctly, if you have a specific address in mind that sent you an email that wasn’t delivered please open an issue at Issues · Infrastructure / Infrastructure · GitLab with details and mark the issue as confidential.