Archiving a project removes all branches except develop and master

Summary

Archiving a project loses all the feature branches 12.1.6-ee.

Steps to reproduce

Create a project with a GitFlow feature branch pat ie feature/Feature-Name as well as develop and master Archive the project Unarchive the project All the feature branches have been lost.

Example Project

(If possible, please create an example project here on GitLab.com that exhibits the problematic behavior, and link to it here in the bug report)

(If you are using an older version of GitLab, this will also determine whether the bug is fixed in a more recent version)

What is the current bug behavior?

Feature branches are lost, all files committed are lost.

What is the expected correct behavior?

History of commits and changes is retained