Unable to update index_pattern with newly added fields.

[lanerjo]

Kibana version:
7.9.1
Elasticsearch version:
7.9.1
Server OS version:
Rhel 7
Browser version:
Any

Original install method (e.g. download page, yum, from source, etc.):
Yum
Describe the bug:
Field (visit.account.details.serviceSubscriptions.voice) is type:keyword
New index created with new mapping (data exists in this field)
Refresh index pattern in Kibana
Field shows temporarily, but unable to aggregate by field

Screenshots (if relevant):
Immediately after refreshing index pattern:
Field appears

No cached mapping for newly added fields:

Unable to aggregate by newly added field:

After hard refresh of browser field no longer appears...

[lanerjo]

upon further inspection I am seeing the following error in kibana logs when trying to refresh the index pattern:

{"type":"error","@timestamp":"2021-02-11T17:15:51Z","tags":[],"pid":16,"level":"error","error":{"message":"Internal Server Error","name":"Error","stack":"Error: Internal Server Error\n at HapiResponseAdapter.toError (/usr/share/kibana/src/core/server/http/router/response_adapter.js:132:19)\n at HapiResponseAdapter.toHapiResponse (/usr/share/kibana/src/core/server/http/router/response_adapter.js:86:19)\n at HapiResponseAdapter.handle (/usr/share/kibana/src/core/server/http/router/response_adapter.js:81:17)\n at Router.handle (/usr/share/kibana/src/core/server/http/router/router.js:162:34)\n at process._tickCallback (internal/process/next_tick.js:68:7)"},"url":{"protocol":null,"slashes":null,"auth":null,"host":null,"port":null,"hostname":null,"hash":null,"search":null,"query":{},"pathname":"/api/saved_objects/index-pattern/8be439c0-cd83-11e8-8da8-33f92a7b1a47","path":"/api/saved_objects/index-pattern/8be439c0-cd83-11e8-8da8-33f92a7b1a47","href":"/api/saved_objects/index-pattern/8be439c0-cd83-11e8-8da8-33f92a7b1a47"},"message":"Internal Server Error"}

[HoyluBert]

I am experiencing the same error. Did you ever find a solution for this?