Add additional EE check

app/assets/javascripts/users_select.js

@@ -425,7 +425,9 @@ window.emitSidebarEvent = window.emitSidebarEvent || $.noop;
 
               // Automatically close dropdown after assignee is selected
               // since CE has no multiple assignees
-              if (getSelected().length === $dropdown.data('max-select')) {
+              // EE does not have a max-select
+              if ($dropdown.data('max-select') &&
+                  getSelected().length === $dropdown.data('max-select')) {
                 // Close the dropdown
                 this.el.click();
 

spec/features/issues/form_spec.rb

@@ -32,10 +32,6 @@ describe 'New/edit issue', feature: true, js: true do
           click_link user.name
         end
 
-        # TODO: Figure out a better way to wait for dropdown CSS hide
-        # animation to complete
-        # sleep 0.3
-
         expect(page.find('.dropdown-menu-user', visible: false)).not_to be_visible
       end
     end