NERVE filtering by type disappears after each merge

[SusanBrown]

If you have filtered a list of entities in NERVE down to a particular type of entity, and then merge some entities, after the merge the list reloads with all entity types.

Expected Behaviour

The filtering should persist unless the user changes the filter settings.

Embedded CWRC-Writer on a very long doc https://cwrc.ca/islandora/object/islandora%3A58ab5ba3-2cb1-4715-ab33-4ee8b789a3bb/edit-cwrc