Flaky spec: spec/features/projects/members/member_leaves_project_spec.rb:23 # Projects > Members > Member leaves project user leaves project by url param

This has shown up a few times lately:

1. https://gitlab.com/gitlab-org/gitlab/-/jobs/345680412
2. !19786 (comment 241709335)

2205 Failures:
2206   1) Projects > Members > Member leaves project user leaves project by url param
2207      Got 0 failures and 2 other errors:
2208      1.1) Failure/Error: expect(find('.flash-notice')).to have_content "You left the \"#{project.full_name}\" project"
2209           Capybara::ElementNotFound:
2210             Unable to find css ".flash-notice"
2211           # ./vendor/ruby/2.6.0/gems/capybara-3.22.0/lib/capybara/node/finders.rb:296:in `block in synced_resolve'