Failure in browser_ui/2_plan/issue/mentions_spec.rb | Plan mention mentions another user in an issue

Full description

Plan mention mentions another user in an issue

File path

./qa/specs/features/browser_ui/2_plan/issue/mentions_spec.rb

Stack trace

Failure/Error: Flow::Login.sign_in

QA::Page::Validatable::PageValidationError:
  navbar did not appear on QA::Page::Main::Menu as expected

First happened in https://ops.gitlab.net/gitlab-org/quality/production/-/jobs/7935692.

Related test case: https://gitlab.com/gitlab-org/gitlab/-/quality/test_cases/347988.