Search UI nested fields in disjunctive facets

A nested field in the disjunctiveFacets array doesn't behave the same way as a non-nested field.

I have a non nested field, Race, and after checking one of the options all of the other options remain selectable which allows me to combine options with OR. However, when I select a nested field, Histology, all of the options do not remain selectable which means I can't create filters with OR combinations.

I want all of the Histologies to remain selectable after an option is checked so that I can combine the filter with ORs. Histology is included in the disjunctiveFacets array in the search config. Is this possible?