Can not delete selected item ones added into Content

I add some new content’s (which has a multi select field e.g. person one, person two)
I save it and it look good the info is there in the view
But if I go back and try to edit it (e.g. deselect items) it dose not let you
See image attached (click the x nothing happens, but can add more)

- Recreate the module and it work now... I can now select & deselect items...(note the field identifier has to be filled in by default it's Title)