FTS Results with Missing Fields Throwing Error

We have an example on Playground that throws an error when the fields are missing from the FTS result row (SearchRow) are missing. 

This is not the same behaviour as in other SDKs like Java where it is shown as null/empty or discarded like in NodeJS. The other SDK outputs can be seen on playground with the same data & index.

Error Message

Found row: SearchRow(travel-fts-index_77859247a4f8c2ff_f4dbdf21,landmark_25956,0.9150004671703761,Failure(java.util.NoSuchElementException: Field explanation does not exist),None,Map(),Failure(java.util.NoSuchElementException: Field fields does not exist))

FTS Index

curl -XPUT  http://${CB_USER}:${CB_PSWD}@localhost:8094/api/index/travel-fts-index \
  -H 'cache-control: no-cache' \
  -H 'content-type: application/json' \
  -d '{
 "name": "travel-fts-index",
 "type": "fulltext-index",
 "params": {
  "mapping": {
   "default_mapping":

Unknown macro: {     "enabled"}

,
   "default_type": "_default",
   "default_analyzer": "standard",
   "default_datetime_parser": "dateTimeOptional",
   "default_field": "_all",
   "store_dynamic": false,
   "index_dynamic": true,
   "docvalues_dynamic": false
  },
  "store":

Unknown macro: {    "indexType"}

,
  "doc_config":

Unknown macro: {    "mode"}

 },
 "sourceType": "couchbase",
 "sourceName": "travel-sample",
 "sourceUUID": "",
 "sourceParams": {},
 "planParams":

Unknown macro: {   "maxPartitionsPerPIndex"}

,
 "uuid": ""
}'