DropDownTextField selecting item from the list doesn't update the controller or the value

[JohnGalt1717]

Given the following:

DropdownTextField<String>(
                        controller: viewModel.person.salutation,
                        decoration: InputDecoration(
                          labelText: LocaleKeys.salutation.tr(),
                        ),
                        onSubmit: (value) =>
                            viewModel.person.salutation.text = value,
                        list: [
                          DropdownItem(
                            value: LocaleKeys.notSpecified.tr(),
                            id: "",
                          ),
                          DropdownItem(
                            value: LocaleKeys.mrs.tr(),
                            id: LocaleKeys.mrs.tr(),
                          ),
                          DropdownItem(
                            value: LocaleKeys.ms.tr(),
                            id: LocaleKeys.ms.tr(),
                          ),
                          DropdownItem(
                            value: LocaleKeys.miss.tr(),
                            id: LocaleKeys.miss.tr(),
                          ),
                          DropdownItem(
                            value: LocaleKeys.mister.tr(),
                            id: LocaleKeys.mister.tr(),
                          ),
                          DropdownItem(
                            value: LocaleKeys.master.tr(),
                            id: LocaleKeys.master.tr(),
                          ),
                        ],
                      )

If you click on the completions and pick say Mr., it doesn't update the controller, the onSubmit and onSuggestionTap don't fire.

It isn't clear based on the documentation nor the sample how to make this work.