There's one test in the selenium tests suite, that's about checking some preset logic logged-in users can use in the default namespace selection of a search. For this test the user is logged in and logged out again. The logout it broken due to similar reasons as in T284817: TwoColConflict selenium daliy failing due to fancy beta options link on beta cluster and that seems to interfere with the following tests.

See https://integration.wikimedia.org/ci/job/selenium-daily-beta-AdvancedSearch/47/testReport/