Impossible to upload cookbooks if non-standard port is used

My chef-server.rb:

nginx['non_ssl_port'] = 8081
nginx['ssl_port'] = 4000

After running chef-server-ctl reconfigure I can't upload cookbook:

INFO: Uploading /var/default/chef-data/cookbooks/squeeze64-1.13.0/yum/templates/default/main.erb (checksum hex = e5ab84fe45a83c038ff442722be03dbd) to https://127.0.0.1:4000/bookshelf/organization-55800a42d41ca4067b8d9cc3f9d1ab51/checksum-e5ab84fe45a83c038ff442722be03dbd?AWSAccessKeyId=e737796ac367dbe4a94c96ad3ed439d9a3099d17&Expires=1419376039&Signature=clYmIZ0ViZA3dXgosSXDTiH9LfA%3D
INFO: HTTP Request Returned 500 Internal Server Error: internal service error
ERROR: Server returned error for https://127.0.0.1:4000/organizations/default/sandboxes/9cc3f9d1ab51f248e5ce1ccd3913b6da, retrying 1/5 in 3s
INFO: HTTP Request Returned 500 Internal Server Error: internal service error
ERROR: Server returned error for https://127.0.0.1:4000/organizations/default/sandboxes/9cc3f9d1ab51f248e5ce1ccd3913b6da, retrying 2/5 in 8s                                              
INFO: HTTP Request Returned 500 Internal Server Error: internal service error                                                                                                                
ERROR: Server returned error for https://127.0.0.1:4000/organizations/default/sandboxes/9cc3f9d1ab51f248e5ce1ccd3913b6da, retrying 3/5 in 10s

Reason:
incorrect erchef template which assumes that default protocol port is used. Attempt to specify vip parameter with port (e.g. 1.1.1.1:4000) causes issue because normalize_host method parses specified string as IPv6

{chef_objects, [
                  {s3_access_key_id, "<%= node['private_chef']['bookshelf']['access_key_id'] %>"},
                  {s3_secret_key_id, "<%= node['private_chef']['bookshelf']['secret_access_key'] %>"},
                  {s3_url, "<%= node['private_chef']['nginx']['x_forwarded_proto'] %>://<%= @helper.vip_for_uri('bookshelf') %>"},