vanishing values in concept-based fields
while creating or enriching an exiting item via the edit form, there is a bug with some of the fields. It seems restricted to the concept-based fields.
I've managed to reproduce at least one case encountered today during the sprint, but it might be that there are other cases I did not identify.
If a concept is chosen for a concept-based field (ex: "public" for intended audience), and some of the property lines above intended audience in the form are then deleted, the concept "public" disappears/vanishes from the field. Nevertheless it is still present and it doesn't prevent users to submit/save the item. Even when trying to select "public again, the concept continues to vanish if clicking somewhere else on the page.
looks very similar to #83 (closed)
notify also @klaus.illmayer @edward.gray