Clear saved query crashes kibana on Discover in some cases

[lizozom]

Kibana version:
master \ 7.7

Elasticsearch version:

Server OS version:

Browser version:

Browser OS version:

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

Describe the bug:

Steps to reproduce:

1. Setup a cloud deployment on staging
2. Create a new user on that deployment
3. Run Kibana locally, with ES running on that deployment
4. Login using the user you just created and load sample data
5. Create a saved query on discover
6. Try clearing the saved query

Kibana gets completely stuck (gets into a weird rendering loop).
The only way to resurrect it is killing the chrome process.
As this does not happen in a setup where ES is running locally, this makes me suspect we have some new race condition.

Expected behavior:
In 7.6 this flow works

Screenshots (if relevant):

Errors in browser console (if relevant):

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

Any additional context:

[Dosant]

This should fix the issue: #63554

From what I understood, it is not related to cloud ES setup. It is related to query language value in local storage.

Bug is reproduced reliably in any environment if preferred query language in uiSettings is different from saved query language in localStorage. :

To reproduce:

Assuming KQL is default language
Go to discover and save a query with KQL
Clear the query
Switch to lucene
Reload the page (lucene should be in the query bar)
Apply the saved query (the one with KQL)
Clear query
Browser is frozen

#63554

[elasticmachine]

Pinging @elastic/kibana-app (Team:KibanaApp)

[elasticmachine]

Pinging @elastic/kibana-app-arch (Team:AppArch)