While centrally looking at browser test failures T277205 it sems that the termbox tests can be a little unreliable in CI.
1 [Chrome 90.0.4430.212 linux #0-8] ✖ "before each" hook for Termbox: reading 1 [Chrome 90.0.4430.212 linux #0-7] ✖ "before each" hook for Termbox: LicenseOverlay 1 [Chrome 90.0.4430.212 linux #0-6] ✖ "before each" hook for Termbox: editing 1 [Chrome 90.0.4430.212 linux #0-5] ✖ "before each" hook for Termbox: AnonEditWarning
The most recent failures of these happen in https://integration.wikimedia.org/ci/view/All/job/wmf-quibble-selenium-php72-docker/125081/
(which I have for now marked as keep the build forever)