Race condition between CKEditor5 JavaScript and ckEditor5CodeSyntaxTest

So, let's start with the main thing: The test in question still works.

The Error while running .setElementValue() protocol action: element not interactable occurs on this:
.click('[href*=edit-editor-settings-plugins-ckeditor5-codeblock]').

In first commit of the MR I've taken a screenshot before and after the click and the screenshots show that the click actually happens.
I've extracted the screenshots from the artifact from the nightwatch job (https://git.drupalcode.org/issue/drupal-3401056/-/jobs/569180/artifacts/...)

Spokje → closed merge request !6018

Incoming long explanation, will update the IS with a TLDR shortly.

The errors described in the IS are happening when the test tries to fill the Code Block field with our set of programming languages.

Before our attempt:

After our attempt: