Cannot query nested field

[mikelam14]

Kibana version:
7.4.1
Elasticsearch version:
7.4.1
Server OS version:
AWS EC2 linux
Browser version:
chrome
Browser OS version:

Original install method (e.g. download page, yum, from source, etc.):
Elastic Cloud ELK

Describe the bug:
Reposting the discussion from here - https://discuss.elastic.co/t/cannot-query-nested-field/225597
I am using elastic cloud ELK. I have created an index with a mapping containing several nested fields. I checked on Kibana and it looks fine. However when I try to write a query in KQL for the nested field, it does not behave the way it should. According to this merge request, and the screenshot below, the autocomplete suggestion should start suggesting a nested syntax while I start to type in the nested field, but it didn't.
Index shown:

>      "field_1": {
>             "type": "nested",
>             "properties": {
>               "sub-field_1": {
>                 "type": "text",
>                 "fields": {
>                   "keyword": {
>                     "type": "keyword",
>                     "ignore_above": 256
>                   }
>                 }
>               },
>               "sub-field_2": {
>                 "type": "text",
>                 "fields": {
>                   "keyword": {
>                     "type": "keyword",
>                     "ignore_above": 256
>                   }
>                 }
>               },

Also I have tried querying the sub-field directly with a wildcard search, like field_1.sub-field_1: *, but not a single result returned.

Related to this pull request - #47070

Steps to reproduce:

1. Create nested field in index
2. Run kibana query

Expected behavior:
Nested field query autocomplete suggestion , like
field: {sub_field:

Screenshots (if relevant):
Desired
https://user-images.githubusercontent.com/6239176/65991057-b9fbfe80-e45a-11e9-907c-827bb2c6e453.gif

Errors in browser console (if relevant):

Provide logs and/or server output (if relevant):

Any additional context:

[wylieconlon]

Nested query support was added in 7.6, and you are on 7.4. Closing as this is expected.