in order to deal with multifield, try to get the docvalues field for retrieving the label

[scampi]

see elastic/kibana#7302 for some example

[sergibondarenko]

The thing is some values may not be stored and so, you may need to retrieve from both source and doc_values (that is, in addition to the problem of multifield). Kibana cannot really tell if a field was in the original doc or was a multifield.

Doc:
https://www.elastic.co/guide/en/elasticsearch/reference/2.4/multi-fields.html
https://www.elastic.co/guide/en/elasticsearch/reference/2.4/doc-values.html