Graylog 2.3.1 not able to sort query by numeric field. 500 error

Hello to all!

When i try to sort search result in graylog by one of my numeric field, like “upstream_response_time” from nginx access logs. I am not able to get sorted result, instead i see error:

Could not execute search
There was an error executing your search. Please check your Graylog server logs for more information.

Error Message:
Unable to perform search query.
Search status code:
Search response:
cannot GET (500)

If i go to:

I see:
{"type":"ApiError","message":"Missing required parameterfields"}

But if i add parameter fields in search query like:

All work fine and download csv file with sort results.
Is kind of bug or feature?) How i can sort search results without error?
Thank you.

Graylog version: Graylog 2.3.1+9f2c6ef on localhost (Oracle Corporation 1.8.0_144 on Linux 3.13.0-132-generic)

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