I have a multilist field Services in sitecore which I have added in solr index as stringCollection using the below configuration.
<field fieldName="servicetitles" returnType="stringCollection" type="Sitecore.XA.Foundation.Search.ComputedFields.ResolvedLinks, Sitecore.XA.Foundation.Search" referenceField="services" contentField="title"/>
I have a Services facet using the servicetitles field and referring it in dropdown filter. I have enabled multiple selection in the Services dropdown filter, but when selecting more than one service, the search results are not shown even if there are providers who offer both the services selected.
This multilist selection does not work in dropdown checklist filter also.