RC1 breaks Cypress Tests

Problem/Motivation

Just updated Gin to RC1 - congrats to this great step Sascha - but unfortunately, we're getting some javascript observer exception in the browser which doesn't seem to do any harm normally, but Cypress fails with an exception I had never seen before: Failed to execute 'observe' on 'IntersectionObserver': parameter 1 is not of type 'Element'.

There is also the following stacktrace available:

This behavior is configurable, and you can choose to turn this off by listening to the `uncaught:exception` event.
    at <unknown> (https://www.example.com/themes/contrib/gin/dist/js/sticky.js?rm3ryk:10:12)
    at Array.forEach (<anonymous>)
    at Object.attach (https://www.example.com/themes/contrib/gin/dist/js/sticky.js?rm3ryk:4:78)
    at <unknown> (https://www.example.com/core/misc/drupal.js?v=9.4.8:27:24)
    at Array.forEach (<anonymous>)
    at Drupal.attachBehaviors (https://www.example.com/core/misc/drupal.js?v=9.4.8:24:34)
    at HTMLUListElement.<anonymous> (https://www.example.com/core/misc/ajax.js?v=9.4.8:569:20)
    at Function.each (https://www.example.com/core/assets/vendor/jquery/jquery.min.js?v=3.6.0:2:3003)
    at S.fn.init.each (https://www.example.com/core/assets/vendor/jquery/jquery.min.js?v=3.6.0:2:1481)
    at Drupal.AjaxCommands.insert (https://www.example.com/core/misc/ajax.js?v=9.4.8:567:21)

Downgrading to beta5 solves the problem. Not sure if the above information is enough to find the issue. If you need any more information, I'm happy to investigate.