Approvals required in the edit form is always the default

Summary

Even though I set the approvals required of a merge request, the approvals required input in the edit form always contains the default. In my case, the default is 1 approval.

Steps to reproduce

  1. Submit a merge request with specific approvals required, different with the default.
  2. Go to the edit page of the merge request.
  3. The approvals required shows the default.

Expected behavior

The approvals required shows the value what I set.

Actual behavior

The approvals required shows the project default.

Relevant logs and/or screenshots

In the view page:

image

In the edit page:

image

Output of checks

Results of GitLab application Check

Too long to paste. But everything is okay.

Results of GitLab environment info

System information
System:         Ubuntu 14.04
Current User:   git
Using RVM:      no
Ruby Version:   2.3.1p112
Gem Version:    2.6.6
Bundler Version:1.13.5
Rake Version:   10.5.0
Sidekiq Version:4.2.1

GitLab information
Version:        8.13.0-ee
Revision:       562bbc6
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     PostgreSQL
DB Version:     9.2.18
URL:            http://xxx
HTTP Clone URL: http://xxx/some-group/some-project.git
SSH Clone URL:  git@xxx:some-group/some-project.git
Elasticsearch:  no
Geo:            no
Using LDAP:     no
Using Omniauth: no

GitLab Shell
Version:        3.6.6
Repository storage paths:
- default:      /var/opt/gitlab/git-data/repositories
Hooks:          /opt/gitlab/embedded/service/gitlab-shell/hooks/
Git:            /opt/gitlab/embedded/bin/git