Gitlab public projects always ask for username when cloning over https

Summary

Attempting to clone public projects over HTTPS will always ask for a username/password, despite Gitlab project visibility being set to public

Steps to reproduce

git clone https://gitlab.myorg.com/projects/project.git

Expected behavior

Should clone without issue...

Actual behavior

Username for 'https://gitlab.myorg.com':

Relevant logs and/or screenshots

Don't really have any useful logs besides the output above

Results of GitLab application Check

All tests are passing

Results of GitLab environment info

System information
System:		Debian 7.9
Current User:	git
Using RVM:	no
Ruby Version:	2.3.1p112
Gem Version:	2.6.6
Bundler Version:1.13.6
Rake Version:	10.5.0
Sidekiq Version:4.2.1

GitLab information
Version:	8.14.4
Revision:	3ea6c8d
Directory:	/opt/gitlab/embedded/service/gitlab-rails
DB Adapter:	postgresql
URL:		https://gitlab.myorg.com
HTTP Clone URL:	https://gitlab.myorg.com/some-group/some-project.git
SSH Clone URL:	git@gitlab.myorg.com:some-group/some-project.git
Using LDAP:	yes
Using Omniauth:	no

GitLab Shell
Version:	4.0.3
Repository storage paths:
- default: 	/var/opt/gitlab/git-data/repositories
Hooks:		/opt/gitlab/embedded/service/gitlab-shell/hooks/
Git:		/opt/gitlab/embedded/bin/git