Gitlab is sending a duplicated email when a tag is deleted

Summary

Gitlab is sending a duplicated email when a tag is deleted

Steps to reproduce

• enable emails on push at project settings;
• delete an existing tag on the same project.

Example Project

https://gitlab.com/mmaya/my-awesome-project/tags

What is the current bug behavior?

When I delete an existing tag the system send two notification emails instead of one.

What is the expected correct behavior?

The system should send just one notification email.

Relevant logs and/or screenshots

Screenshots of the duplicate emails

Output of checks

This bug happens on GitLab.com