In the file page-builder/src/bundle/Resources/views/page_builder/block/form_fields.html.twig, after changing the classes with the ez prefix to ibexa, we did not notice that the ibexa-field-edit class exists there, so it was duplicated
it was

ibexa-field-edit ez-field-edit

and it was changed to

ibexa-field-edit ibexa-field-edit