Transient failure in qa/specs/features/browser_ui/2_plan/issue/check_mentions_for_xss_spec.rb

Happening on master: https://gitlab.com/gitlab-org/gitlab-qa/-/jobs/364450359

Failures:
2383   1) Plan check xss occurence in @mentions in issues user mentions a user in comment
2384      Failure/Error:
2385        expect do
2386          expect(show).to have_content("cc-ing you here")
2387        end.not_to raise_error # Selenium::WebDriver::Error::UnhandledAlertError
2388      
2389        expected no Exception, got #<RSpec::Expectations::ExpectationNotMetError: expected to find text "cc-ing you here" in "Skip to co...t-2019-11-29-01-57-09-288f1816e380b99e/xss-test-for-mentions-project-403ad4bdc7601860#1 Move issue"> with backtrace:
2390          # ./qa/specs/features/browser_ui/2_plan/issue/check_mentions_for_xss_spec.rb:45:in `block (5 levels) in <module:QA>'
2391          # ./qa/specs/features/browser_ui/2_plan/issue/check_mentions_for_xss_spec.rb:44:in `block (4 levels) in <module:QA>'
2392          # ./qa/scenario/actable.rb:16:in `perform'
2393          # ./qa/specs/features/browser_ui/2_plan/issue/check_mentions_for_xss_spec.rb:40:in `block (3 levels) in <module:QA>'
2394          # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:123:in `block in run'
2395          # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:110:in `loop'
2396          # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:110:in `run'
2397          # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec_ext/rspec_ext.rb:12:in `run_with_retry'
2398          # ./spec/spec_helper.rb:68:in `block (2 levels) in <top (required)>'
2399          # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:123:in `block in run'
2400          # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:110:in `loop'
2401          # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:110:in `run'
2402          # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec_ext/rspec_ext.rb:12:in `run_with_retry'
2403          # /usr/local/bundle/gems/rspec-retry-0.6.1/lib/rspec/retry.rb:37:in `block (2 levels) in setup'
2404          # ./qa/specs/runner.rb:69:in `perform'
2405          # ./qa/scenario/template.rb:10:in `block in perform'
2406          # ./qa/scenario/template.rb:8:in `tap'
2407          # ./qa/scenario/template.rb:8:in `perform'
2408          # ./qa/scenario/template.rb:33:in `perform'
2409          # ./qa/scenario/template.rb:10:in `block in perform'
2410          # ./qa/scenario/template.rb:8:in `tap'
2411          # ./qa/scenario/template.rb:8:in `perform'
2412          # ./qa/scenario/bootable.rb:28:in `launch!'

Screenshot: image

Another issue where the test is not waiting long enough for things to load.