Failing behat scenarios after upgrading to Chrome 89 and up

We were impatiently waiting for Chrome 89 (selenium image) to be available and, some hours ago, it finally was created.

So, in https://github.com/moodlehq/moodle-ci-runner/pull/51 we unpinned the old Chrome 79 we were using and switched to Chrome 89 for all the CI infrastructure (~10h ago).

Since then, some scenarios, previously passing have started to fail, more or less consistently. Details follow, common point is that all them seem to fail with a "element has zero size" error.

Add and configure small quiz and perform an attempt as a student with Javascript enabled

• It only happens if you run the tests headless (current default for CI jobs). Consistently.
• Reproducible 100% locally.
• Link: https://ci.moodle.org/job/W.03.05%20-%20Behat%20-%20Chrome%20+%20Oracle/816/ (ignore the other failure it's already tracked).

  001 Scenario: Add and configure small quiz and perform an attempt as a student with Javascript enabled # /var/www/html/mod/quiz/tests/behat/add_quiz.feature:44

  And I log out # /var/www/html/mod/quiz/tests/behat/add_quiz.feature:31

  element not interactable: element has zero size

  (Session info: headless chrome=89.0.4389.82) (Facebook\WebDriver\Exception\ElementNotInteractableException)

Natural aggregation from the setup screen

• It happens both headless and normal runs (and not always!)
• Passing locally (tried 5 times).
• Link: https://ci.moodle.org/job/S310.03.01%20-%20Behat%20-%20Chrome%20+%20Postgres/48/

  001 Scenario: Natural aggregation from the setup screen # /var/www/html/grade/tests/behat/grade_aggregation.feature:451

  And I set the field "Override weight of Sub category 1" to "1" # /var/www/html/grade/tests/behat/grade_aggregation.feature:477

  element not interactable: element has zero size

  (Session info: chrome=89.0.4389.82) (Facebook\WebDriver\Exception\ElementNotInteractableException)