I was bored and decided to enable trace level logging on the elasticsearch client that kibana is using. What I found are multiple calls to "[indices:data/read/field_stats[s]]" that in some cases take a very long time to get a response. Here is a log of about 50 seconds worth of log data: https://pastebin.com/DJnj9Lxp
Note that Kibana will timeout after 30 seconds, if it's asking for "field stats" for every field in the index, I have thousands... this query may never finish! What can I do to disable this, or otherwise restore Kibana to how it behaved in version 2.4 so I can get it back to a usable state?