Fixed filtering error

app/assets/javascripts/filtered_search/dropdown_utils.js

@@ -117,7 +117,7 @@ import FilteredSearchContainer from './container';
           const { isLastVisualTokenValid } =
             gl.FilteredSearchVisualTokens.getLastVisualTokenBeforeInput();
 
-          const input = document.querySelector('.filtered-search');
+          const input = FilteredSearchContainer.container.querySelector('.filtered-search');
           const inputValue = input && input.value;
 
           if (isLastVisualTokenValid) {

spec/features/boards/add_issues_modal_spec.rb

@@ -109,6 +109,8 @@ describe 'Issue Boards add issue modal', :feature, :js do
           find('.form-control').native.send_keys(issue.title)
           find('.form-control').native.send_keys(:enter)
 
+          wait_for_vue_resource
+
           expect(page).to have_selector('.card', count: 1)
         end
       end
@@ -118,6 +120,8 @@ describe 'Issue Boards add issue modal', :feature, :js do
           find('.form-control').native.send_keys('testing search')
           find('.form-control').native.send_keys(:enter)
 
+          wait_for_vue_resource
+
           expect(page).not_to have_selector('.card')
           expect(page).not_to have_content("You haven't added any issues to your project yet")
         end