Umbraco 14 Form Picker null and empty in Umbraco backoffice

[Mdwolff]

Which Umbraco version are you using? (Please write the exact version, example: 10.1.0)

14.0.0

Bug summary

When selecting a form using the form picker in a block list it works and you can select the form. When you then try to load the form into the view the value is null. And after reloading the page in Umbraco the field where you select the form is empty and you also cant delete of select another form. Als tried to add the picker to a page type, this gives the same result.

Specifics

Steps to reproduce

Add a form picker property to a page or block (they both have the same issue). Select a form and then reload the page, the picker is then empty and not available.

The console also gives an error saying; TypeError: selection.filter is not a function

Expected result / actual result

Selecting a form returns the Guid in the view and you an change or remove the form in Umbraco using the picker.