Pipeline badge switches to "unkonwn" when no pipeline is triggered

Summary

When pushing changes that don't trigger a pipeline because of only policies, the "pipeline" badge for the branch switches to "unknown" instead of displaying the last piepline's result. Note that I am specifically refering to the pipeline badge linked to a branch, since they are to ones that get updated.

Steps to reproduce

  1. Create a project with a README containing the "pipeline" badge, and a CI pipeline with an only policy
  2. Push a commit that triggers the pipeline
  3. Push a second commit that doesn't trigger the pipeline

What is the current bug behavior?

The "pipeline" badge for the branch becomes "unkown" when no new pipeline is triggered by a push

What is the expected correct behavior?

The "pipeline" badge still displays the last pipeline's result, even when a push occurs that doesn't trigger a new pipeline

Results of GitLab environment info

Expand for output related to GitLab environment info 
System information
System:         Ubuntu 18.04
Current User:   git
Using RVM:      no
Ruby Version:   2.6.3p62
Gem Version:    2.7.9
Bundler Version:1.17.3
Rake Version:   12.3.2
Redis Version:  3.2.12
Git Version:    2.22.0
Sidekiq Version:5.2.7
Go Version:     unknown

GitLab information
Version:        12.3.1
Revision:       3440d0f6100
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     PostgreSQL
DB Version:     10.9
URL:            https://[...]
HTTP Clone URL: https://[...]
SSH Clone URL:  git@[...]
Using LDAP:     no
Using Omniauth: yes
Omniauth Providers: github, gitlab, bitbucket, twitter, google_oauth2


GitLab Shell
Version:        10.0.0
Repository storage paths:
  • default: /var/opt/gitlab/git-data/repositories GitLab Shell path: /opt/gitlab/embedded/service/gitlab-shell Git: /opt/gitlab/embedded/bin/git

Results of GitLab application Check

Expand for output related to the GitLab application check 
Checking GitLab subtasks ...

Checking GitLab Shell ...


GitLab Shell: ... GitLab Shell version >= 10.0.0 ? ... OK (10.0.0)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Check GitLab API access: OK
Redis available via internal API: OK


gitlab-shell self-check successful


Checking GitLab Shell ... Finished


Checking Gitaly ...


Gitaly: ... default ... OK


Checking Gitaly ... Finished


Checking Sidekiq ...


Sidekiq: ... Running? ... yes
Number of Sidekiq processes ... 1


Checking Sidekiq ... Finished


Checking Incoming Email ...


Incoming Email: ... Checking Reply by email ...


IMAP server credentials are correct? ... yes
Init.d configured correctly? ... skipped
MailRoom running? ... skipped


Checking Reply by email ... Finished


Checking Incoming Email ... Finished


Checking LDAP ...


LDAP: ... LDAP is disabled in config/gitlab.yml


Checking LDAP ... Finished


Checking GitLab App ...


Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
Projects have namespace: ...
4/9 ... yes
4/13 ... yes
4/14 ... yes
4/15 ... yes
4/16 ... yes
4/19 ... yes
8/21 ... yes
11/22 ... yes
11/23 ... yes
11/24 ... yes
11/25 ... yes
4/26 ... yes
11/27 ... yes
11/28 ... yes
4/31 ... yes
5/32 ... yes
11/33 ... yes
4/34 ... yes
13/40 ... yes
13/41 ... yes
14/42 ... yes
14/43 ... yes
14/44 ... yes
14/45 ... yes
15/47 ... yes
16/48 ... yes
4/49 ... yes
4/50 ... yes
4/51 ... yes
4/52 ... yes
16/53 ... yes
4/54 ... yes
11/55 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.5.3 ? ... yes (2.6.3)
Git version >= 2.22.0 ? ... yes (2.22.0)
Git user has default SSH configuration? ... yes
Active users: ... 7
Is authorized keys file accessible? ... yes


Checking GitLab App ... Finished


Checking GitLab subtasks ... Finished