Edited-then-deleted filters still get set

Typing into a filter field such as Employee ID and then delete it before engaging the filter, but subsequently add a new filter to a different field, the system will correctly add the new filter but will also add an unexpected filter for the first field being blank.

Reproduce the issue by entering and deleting a value in a filter field such as Employee ID, then adding a filter for another field. Trace the filter state and submission flow to identify why the deleted field is included as blank. Done means the new filter is added without an unexpected blank filter for the earlier field, with coverage for this sequence.

Written by the indexing model from the issue text.