Transient failure in spec/features/protected_tags_spec.rb

As seen in https://gitlab.com/gitlab-org/gitlab-ce/builds/15588910:

  1) Projected Tags access control allows creating protected tags that No one can create
     Failure/Error: find('.create_access_levels-container .dropdown-menu li', match: :first)

     Capybara::ElementNotFound:
       Unable to find css ".create_access_levels-container .dropdown-menu li"
     Shared Example Group: "protected tags > access control > CE" called from ./spec/features/protected_tags_spec.rb:91
     # ./spec/features/protected_tags/access_control_ce_spec.rb:13:in `block (4 levels) in <top (required)>'
     # ./spec/features/protected_tags/access_control_ce_spec.rb:8:in `block (3 levels) in <top (required)>'
     # ./spec/spec_helper.rb:76:in `block (2 levels) in <top (required)>'

Finished in 29 minutes 25 seconds (files took 27.7 seconds to load)
1406 examples, 1 failure

Failed examples:

rspec './spec/features/protected_tags_spec.rb[1:3:5]' # Projected Tags access control allows creating protected tags that No one can create

This seems to be an animation related transient failure. I've given it a stab but nothing has worked yet so I'm opening this issue to attract other frontenders.