Discover app searches broken on 5.6.11

[vinodtalati]

Plugin version:
5.6.11-1.0.0

Kibana version:
5.6.11

Plugins installed:
X-pack and nested plugin

Description of the problem including expected versus actual behavior:
I have several indices on the cluster. When enabling the plugin on only one index the discover searching breaks for all other indices. Everything works fine on the index with nesting enabled.
Also, the search display is always "Uses lucene syntax" on all index searching including the one with nesting enabled.

Steps to reproduce:

1. enable nested configuration on only one index via the management UI
2. UI issue in discover app on the nested index: Search bar shows "uses lucene syntax" instead of "uses kqnl syntax". Search results and queries are correct.
3. Search issue on all non nesting enabled indices: Discover UI shows "uses lucene syntax" as expected and all search queries reset to "*"

Errors in browser console (if relevant):
n/a

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

If using docker, include your docker file:
not using docker