Error when closing UDW on content modal in linked text / Richtext block / Landing page.

Steps to reproduce, on 4.2.1:
1. Create a landing page with richtext block
2. go to block settings, put some text in the editor
3. highlight text, click on 'show more items', pick 'Link'
4. Click select content, UDW should show up
5. try to cancel the UDW

expected: UDW should be closed.
actual: Error in console:

Uncaught TypeError: Cannot read properties of undefined (reading 'focus')
    at IbexaLinkFormView.cancelHandler (ibexa-richtext-onlineeditor-js.js:128150:19)
    at onCancel (ibexa-page-builder-parts-javascript-js.js:2792:164)

link to code