Redundant Columns When Downloading Lens Tables

[Link3750]

Kibana version: 7.16.2

Elasticsearch version: 7.16.2

Server OS version: centOS 7

Browser version: google Chrome 97.0.4692.71

Browser OS version:

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

Describe the bug: I found redundant columns in a table Created by Lens. I guess when producing it, the server side makes some temp columns if the table uses math equation divide(sum(column1), sum(column2)) of Formula

Steps to reproduce:

1. import data into Kibana;
2. create a table by Lens;
3. use divide(sum(column1), sum(column2)) to calculate.
4. download table as CSV
5. open it and find there are some redundant columns such as "part of column1" or "part of column2"

Expected behavior:
delete redundant columns in downloaded CSV files.

Screenshots (if relevant):
unsaved.csv

Errors in browser console (if relevant):

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

Any additional context:

[flash1293]

Duplicate of #121063