How to reproduce:
- Follow the instructions on the Fashion demo at https://intranet.nuxeo.com/nuxeo/ui/#!/doc/84118793-28e0-4210-88af-7b7d43fa93a4
- in webui create a collection
- create a file and add one of the photos of the file provided in the instructions
- go to edit and remove one of the field suggestions, save.
- go again to edit and try to add the suggestion you removed
- nothing is added and suggestions stays as if it is selected - bug