Nextcloud 13.0.0 Email notifications issue

Hi, we have a problem with user’s email notification.

When we flag on user’s settings-activities " A file or folder shared by mail or by public link was downloaded" and we share a doc no email notifications after downloading.

Notifications works well for test email and for documents initial sharing .

Have you enabled necessary app? Please check available apps for activity

Yes, we already enabled “Share by email” and “File sharing” and “Activity”, any idea? Thank you

Maybe I was wrong. Activity and email are not the same.
Have you enabled

Tried that stuff a while ago and cannot remember email content.