nuxeo-dropdown-aggregation don't apply filters in the results list

Steps to reproduce:

• Creare a schema which contains a field (directory type)
  
• Associate the schema to a document type
• Create a Page Provider
• Add an aggregate that uses the directory field
  
• Create a custom search in View Designer

    <div role="widget">
      <label>Offence</label>
      <nuxeo-dropdown-aggregation value="{{params.sdCaseRecordMetadata_offence_agg}}" data="[[aggregations.sdCaseRecordMetadata_offence_agg]]"></nuxeo-dropdown-aggregation>
    </div>

• Reload the new configuration in your instance
• Click on your search menu
  

The aggregation filter shows the number of results for each directory item, but when you select one, the selection is not applied in the result list

Workaround:
Add the property multiple at true in the designer.
Expected:
Generate the nuxeo-dropdown-aggregate with the property multiple at true.